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AIIMS Full Mock Test - 5

200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Full Mock Test - 5

Description

This mock test of AIIMS Full Mock Test - 5 for NEET helps you for every NEET entrance exam. This contains 200 Multiple Choice Questions for NEET AIIMS Full Mock Test - 5 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Full Mock Test - 5 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Full Mock Test - 5 exercise for a better result in the exam. You can find other AIIMS Full Mock Test - 5 extra questions, long questions & short questions for NEET on EduRev as well by searching above.

QUESTION: 1

The impedance of a circuit consists of 3 ohm resistance and 4 ohm reactance. The power factor of the circuit is

A.
0.4
B.
0.6
C.
0.8
D.
1.0

Solution:

QUESTION: 2

Photons of energy 1eV and 2.5 eV successively illuminate a metal whose work function is 0.5 eV. The ratio of the maximum speeds of the electrons emitted will be

A.
1 : 4
B.
1 : 2
C.
2 : 1
D.
4 : 1

Solution:

QUESTION: 3

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

A.
Charge Q
B.
Potential V
C.
Capacity C
D.
Energy U

Solution:

When a capacitor is disconnected from the battery, then the charge Q remains unchanged

QUESTION: 4

A rifle bullet loses 1/20th of its velocity in passing through a plank. The least number of such planks required just to stop the bullet is

A.
5
B.
10
C.
11
D.
20

Solution:

QUESTION: 5

At what temperature, the resistance of a copper wire will become three times its value at 0ºC ? (Temperature coefficient of resistance for copper = 4 x 10⁻³per ºC)

A.
400ºC
B.
450ºC
C.
500ºC
D.
550ºC

Solution:

QUESTION: 6

Photon of 5.5eV energy fall on the surface of the metal emitting photoelectrons of maximum kinetic energy 4.0eV. The stopping voltage required for these electrons are

A.
5.5V
B.
1.5V
C.
9.5V
D.
4.0V

Solution:

QUESTION: 7

Choke coil works on the principle of

A.
Transient current
B.
Mutual induction
C.
Self induction
D.
Wattless current

Solution:

QUESTION: 8

In an L-R circuit, time constant is that time in which current grows from zero to the value

A.
0.63 I₀
B.
0.50 I₀
C.
0.37 I₀
D.
I₀

Solution:

QUESTION: 9

Which of the following statements is correct ?

A.
The current in a photocell increases with increasing frequency of light
B.
The photo current is proportional to applied voltage
C.
The photo current increases with the increasing intensity of light
D.
The stopping potential increases with increasing intensity of light

Solution:

QUESTION: 10

Quantum theory of light gives concept of

A.
Electrons
B.
Photons
C.
Positrons
D.
Neutrons

Solution:

QUESTION: 11

In photoelectric emission the number of electrons ejected per second

A.
Is proportional to the intensity of light
B.
Is proportional to the wavelength of light
C.
Is proportional to the frequency of light
D.
Is proportional to the work function of metal

Solution:

QUESTION: 12

A 100 mH coil carries a current of 10 A. The magnetic energy stored in the coil is

A.
0.1 J
B.
0.5 J
C.
1 J
D.
5 J

Solution:

QUESTION: 13

In an oscillating LC circuit the maximum charge on the capacitor is Q. The charge on the capacitor when the energy is stored equally between the electric and magnetic fields is

A.
Q/2
B.
C.
D.
Q

Solution:

QUESTION: 14

If the unit of force and length be each increased by four times, then the unit of energy is increased by

A.
16 times
B.
8 times
C.
2 times
D.
4 times

Solution:

QUESTION: 15

Maxwell's equation describe the fundamental laws of

A.
electricity only
B.
magnetism only
C.
mechanics only
D.
both a and b

Solution:

QUESTION: 16

If a positive charge is shifted from a low potential region to a high potential region, then the electric potential energy of the system

A.
decreases
B.
increases
C.
becomes zero
D.
remains the same

Solution:

QUESTION: 17

The enegy stored in wound watch spring is

A.
K.E
B.
P.E
C.
Heat energy
D.
Chemical energy

Solution:

QUESTION: 18

A particle of charge -q and mass m moves in a circle of radius r around an infinitely long line charge of linear charge density + λ . Then time period will be:(Where

Solution:

QUESTION: 19

One feels hotter at the top of a flame than the sides because of

A.
Conduction
B.
Convection
C.
Radiations
D.
Both 'a' and 'c'

Solution:

QUESTION: 20

Time period of oscillation of a magnet is 2 sec. When it is remagnetised so that its pole strength is 4 times, its period will be

A.
4 sec
B.
2 sec
C.
1 sec
D.
8 sec

Solution:

QUESTION: 21

If t₁ and t₂ are time taken by two different coils for producing same heat with same supply, then the time taken by them to produce the same heat when connected in parallel will be

A.
t 1 t 2 t 1 + t 2
B.
t₁ + t₂
C.
t₁t₂
D.
t 1 + t 2 t 1 t 2

Solution:

QUESTION: 22

A wire of length L and radius a rigidly fixed at one end. On stretching the other end of the wire with a force F, the increase in it length is l. If another wire of same material but of length 2L and radius 2a is stretched with a force 2F, the increase in its length will be

A.
l/4
B.
l
C.
l/2
D.
2l

Solution:

QUESTION: 23

Magnetic dipole moment is a vector quantity directed from

A.
South to north
B.
North to south
C.
East to west
D.
West to east

Solution:

QUESTION: 24

A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is

A.
Both the scales read M/2 kg each
B.
Both the scales read M kg each
C.
The scale of the lower one reads M kg and of the upper one zero
D.
The reading of the two scales can be anything but the sum of the reading will be M kg

Solution:

QUESTION: 25

The radioisotope, tritium (³H₁) has a half-life of 12.3 years. If the initial amount of tritium is 32 mg, how many miligrams of it would remain after 49.2 years ?

A.
2 mg
B.
4 mg
C.
8 mg
D.
1 mg

Solution:

QUESTION: 26

A hollow sphere is filled with water through a small hole in it. It is hung by a long thread and made to oscillate. As the water slowly flows out of the hole at the bottom, the period of oscillation will

A.
First increase and then decrease
B.
First decrease and then increase
C.
Continuously increase
D.
Continuously decrease

Solution:

QUESTION: 27

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Any internal forces in the system are included while considering force for Newton's second law of motion.
Reason(R): The force in the law stands for the net force on the system.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 28

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Sound produced in air is not heard by a person deep inside water .
Reason(R): Most of the sound is refracted from air to water and very less is reflected .

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is false but Reason is true.
D.
Assertion is true but Reason is false.

Solution:

QUESTION: 29

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Decay of radioactive substance is rapid in the beginning.
Reason(R): At any instant the rate of decay of radioactive is proportional to the number of atoms present at that instant.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 30

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): All processes in which pressure and volume are proportional, take place at constant temperature.
Reason(R): Work done in a thermodynamical process is path dependent.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 31

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Length, mass and velocity can act as fundamental quantities in a system of units; mass, time and velocity also can but length, time and velocity can't
Reason (R) : The fundamental quantities are those quantities which do not depend on other quantities in the system

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 32

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A body of mass m₁ collides head on elastically with another stationary body of mass m₂. After the collision, velocity of mass m₂ is maximum, when m₁<<m₂.
Reason(R): Velocity of second body is always maximum, when its mass m₂ is greater than mass of the hitting body.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 33

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The combination Y = sin ωt + cos2ωt is not a simple harmonic function even though it is periodic.
Reason(R): All periodic functions satisfy the relation Y = -kY or

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 34

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A parallel plate capacitor is connected across battery through a key. A dielectric slab of constant K is introduced between the plates. The energy stored becomes K times.
Reason(R): The surface density of charge on the plates remains constant or unchanged.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 35

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

The volmeter measures the potential difference between two points of a circuit.
Hence it is connected in parallel to those points

QUESTION: 36

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 37

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 38

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): If a pin-sited hole is created in an otherwise uniform spherical shell of definite mass and radius, the gravitational field at a point just out side and close to hole is zero
Reason(R): In the given case, the field just inside and just outside (along the hole) must be same the field inside is zero, hence the field outside should also be zero.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 39

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Gravitational potential of the earth at every place is negative.
Reason(R): Everybody on earth is bound by the attraction of earth.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 40

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 41

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A wire has a resistance of 12Ω. It is bent in the form of a circle. The effective resistance between two points on any diameter is 6Ω.
Reason(R): Equivalent resistance between two points on any diameter is in series.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 42

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Alpha decay and beta decay are accompanied by gamma decay.
Reason(R): On α and β decay, the daughter nucleus is in excited state. It returns to ground state by gamma emission.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 43

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A closed pipe produces only old harmonics, while an open pipe produces only even harmonics.
Reason(R): Closed end of the pipe reflects the longitudinal wave like a rigid boundary while the open end reflects the longitudinal wave like a free boundary .

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 44

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Nuclear fission is the basis of a hydrogen bomb.
Reason(R): Fission bomb is much more powerful and destructive than the fission bomb.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 45

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 46

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Gases, in general , are poor conductors of electricity .
Reason(R): At the same temperature and pressure equal volumes of all gases contain equal number of molecules.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 47

An electric motor creates a tension of 4500 newton in a hoisting cable and reels it in at the rate of 2 m/sec. What is the power of electric motor

A.
15 kW
B.
9 kW
C.
225 W
D.
9000 HP

Solution:

QUESTION: 48

A particle of mass m is projected with the velocity ν making an angle of 45º with the horizontal. The magnitude of the angular momentum of the particle about the point of projection when the particle is at its maximum height is (where g = acceleration due to gravity)

A.
zero
B.
m ν³/(4√2g)
C.
m ν²/(√2g)
D.
m ν²/√2g

Solution:

QUESTION: 49

Critical angle for light going from medium (i) to (ii) is θ. The speed of light in medium (i) is ν. Then speed in medium (ii) is

A.
ν(1-cos θ)
B.
ν/sin θ
C.
ν/cos θ
D.
ν(1-sin θ)

Solution:

QUESTION: 50

When a glass lens with n = 1.47 is immersed in a trough of liquid, it looks to be disappeared. The liquid in the trough could be

A.
Water
B.
Kerosene
C.
Glycerin
D.
Alcohol

Solution:

QUESTION: 51

A spherical air bubble is embedded in a piece of glass. For a light ray passing through it, it behaves like a

A.
Convergent lens
B.
Divergent lens
C.
Glass slab
D.
Hole

Solution:

QUESTION: 52

The potential barrier, in the depletion of layer, is due to

A.
Ions
B.
Holes
C.
Electrons
D.
Both b and c

Solution:

QUESTION: 53

When the electrical conductivity of a semiconductor is due to the breaking of its covalent bonds, then the semiconductor is said to be

A.
Donar
B.
Acceptor
C.
Intrinsic
D.
Extrinsic

Solution:

QUESTION: 54

Which physical quantities have the same dimension

A.
Couple of force and work
B.
Force and power
C.
Latent heat and specific heat
D.
Work and pressure

Solution:

QUESTION: 55

When an electric current flows in a conductor, its temperature

A.
increases
B.
decreases
C.
remains constant
D.
first '1' then '3'

Solution:

QUESTION: 56

The SI unit of universal gas constant (R) is

A.
Watt K⁻¹ mol¹
B.
Newton K⁻¹ mol⁻¹
C.
Joule K⁻¹ mol¹
D.
Erg K⁻¹ mol⁻¹

Solution:

QUESTION: 57

Which of the following property of light waves is not observed in sound waves?

A.
reflection
B.
refraction
C.
polarisation
D.
doppler effect

Solution:

QUESTION: 58

When a source of light is receding away from an observer, then the spectral lines will get displaced towards

A.
red region
B.
blue region
C.
violet region
D.
ultra-violet region

Solution:

QUESTION: 59

The sun is rotating about is own axis. The spectral lines emitted from the two ends of its equator, for an observer on the earth, will show

A.
no shift
B.
shift towards red end
C.
shift towards violet end
D.
shift towards red from one end shift towards violet from the other

Solution:

QUESTION: 60

A body of mass m is moving in a circle of radius r with a constant speed v. The force on the body is and is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle

A.
B.
Zero
C.
D.

Solution:

Work done by the centripetal force is zero

QUESTION: 61

Absolute alcohol (100% alcohol) is prepared by distilling rectified spirit over

A.
Na
B.
CaCl₂
C.
Mg
D.
Mg(OC₂H₅)₂

Solution:

QUESTION: 62

Which of the following has the smallest heat of hydrogenation per mole?

A.
1-Butene
B.
trans-2-Butene
C.
cis-2-Butene
D.
1,3-Butadiene

Solution:

Conjugated double bond being most stable has the least heat of hydrogenation

QUESTION: 63

The volume in litres of CO₂ liberated at STP when 10 grams of 90% pure limestone is heated completely is

A.
22.4
B.
2.24
C.
20.16
D.
2.016

Solution:

Limestone (CaCO₃) has a molar mass of = 100 g/mol
So, 10 gm of 100% pure CaCO₃ would = 10 gm of CaCO₃
90% pure CaCO₃ means, each 10 gm of sample will have, = x 10 = 9 gm CaCO₃
So, number of moles of CaCO₃ = given mass/ molar mass = = 0.09
Now, we have the reaction,
CaCO₃ → CaO + CO₂
When 1 mole of CaCO₃ yields 1 moles of CO₂
0.09 moles of CaCO₃ will yield 0.09 moles of CO₂
1 mole of CO₂ = 22.4 liters (at STP)
So, total volume = 22.4 x 0.09 = 2.016 liters

QUESTION: 64

The most reactive among the following towards sulphonation is

A.
Toluene
B.
Chlorobenzene
C.
Nitrobenzene
D.
m-Xylene

Solution:

QUESTION: 65

The oxidation of toluene with air in the presence of V₂O₅ catalyst, gives

A.
benzoic acid
B.
chlorobenzene
C.
benzoic anhydride
D.
vanadium benzoate

Solution:

QUESTION: 66

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

A.
Chlorination, nitration, reduction
B.
Nitration, chlorination, reduction
C.
Nitration, reduction, chlorination
D.
Nitration, reduction, Acylation, chlorination, hydrolysis

Solution:

QUESTION: 67

Freon is used as a

A.
catalyst
B.
oxidation
C.
refrigerants
D.
both 2 and 3

Solution:

QUESTION: 68

which of the following shows electrical conduction?

A.
sodium
B.
graphite
C.
diamond
D.
potassium

Solution:

QUESTION: 69

Pi bond is formed by the overlapping of

A.
p-p orbitals along their axis
B.
s-p orbitals along their axis
C.
p-p orbitals along perpendicular to their axis
D.
s-s orbitals

Solution:

QUESTION: 70

A catalyst

A.
increases the average kinetic energy of reacting molecules
B.
increases the activation energy
C.
alters the reaction mechanism
D.
increases the frequency of collision of reaction species

Solution:

QUESTION: 71

A reaction involving two different reactants can never be

A.
Bimolecular reaction
B.
Second order reaction
C.
First order reaction
D.
Unimolecular reaction

Solution:

QUESTION: 72

Heat exchanged in a chemical reaction at constant temperature and pressure is called

A.
entropy change
B.
enthalpy change
C.
internal energy change
D.
free energy change

Solution:

QUESTION: 73

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Boric acid acts as a strong acid in presence of catechol.
Reason(R): Boric acid does not act as a proton donor but behaves as a Lewis acid.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 74

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Magnetic moment value for copper (II) acetate is less than that for one unpaired electron.
Reason(R): Interaction between unpaired electrons belonging to different copper atoms occurs via bridging acetate group.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 75

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Production of electricity by thermal plants is a very efficient method.
Reason(R): In thermal plants, the chemical energy (heat of combustion) of fossil fuels (coal, gas or oil) is used to produce electricity.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 76

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): sp³ orbital forms the longest and sp orbital forms the shortest bond.
Reason(R): sp³ orbital the longest and sp orbital forms the shortest bond.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 77

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 78

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

The glucose units are linked to one another by α-glycosidic linkages in starch

QUESTION: 79

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 80

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 81

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Second ionisation energy is always smaller than the first ionisation energy .
Reason(R): It is difficult to remove a negatively charged species from an already positively charged species.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is true but Reason is false.

Solution:

QUESTION: 82

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 83

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Nitrogen is unreactive at room temperature but becomes reactive at elevated temperatures or in presence of a catalyst.
Reason(R): In nitrogen molecule there is extensive delocalisation of electrons.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 84

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 85

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In titration of Na₂CO₃ and HCl phenolphthalein can be used as indicator.
Reason(R): Phenolphthalein can be used as indicator in acid base titrations.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 86

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Water is not known to react with metal salts.
Reason(R): Water occupies the interstitial sites in the crystal lattice of some compounds.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 87

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): bcc arrangement is less closely packed than ccp arrangement .
Reason(R): In ccp arrangement, the two atoms at the corners of the unit cells are touching each other whereas in bcc arrangement, they are not touching each other.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 88

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In acidic medium equivalent weight of K₂Cr₂O₇ equals to 294 same as that of molecular weight.
Reason(R): In acidic medium K₂Cr₂O₇ does not observe any change.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 89

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Alkylation of benzene by Friedal-Craft reaction gives polyalkylated compounds.
Reason(R): The ring gets activated for further substitution after the introduction of one alkyl group.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 90

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Aqueous solution of phenol is called as carbonic acid.
Reason(R): Increasing order of acidity of phenols is m-nitrophenol>o-nitrophenol>p-nitrophenol.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

Aqueous solution of phenol is known as carbolic acid
Electron withdrawing groups such as bond -NO₂, -CN, - X increase the acidity of phenol.
The increase is more when electron withdrawing groups are at o-and p-positions than at m-position. i.e.,
p - nitrophenol > o-nitrophenol > m-nitrophenol

QUESTION: 91

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The tendency of alkyl halides to undergo dehydrohalo-genation in Williamson's synthesis is tert>sec>prim.
Reason(R): The order of stability of carbocation is prim>sec>tert.

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 92

A.
Both Assertion and Reason are true and Reason is the correct explanation of assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of assertion.
C.
Assertion is true but Reason is false.
D.
Assertion is false but Reason is true.

Solution:

QUESTION: 93

Faraday constant

A.
is a numerical constant
B.
depends on equivalent
C.
depends upon the current passed
D.
depends on the number of electrons

Solution:

QUESTION: 94

The current in a given wire is 1.8 A. A charge passed through the wire in 1.36 minutes is

A.
100 C
B.
147 C
C.
247 C
D.
347 C

Solution:

QUESTION: 95

Air at sea-level is dense ,this is practical application of

A.
Boyle's law
B.
Avogadro law
C.
Charles law
D.
Dalton law

Solution:

QUESTION: 96

A combustile gas is liberated when caustic soda solution is heated with

A.
S
B.
NH₄Cl
C.
I₂
D.
Zn

Solution:

QUESTION: 97

Caesium oxide will be

A.
very strongly basic
B.
acidic
C.
weakly basic
D.
amphoteric

Solution:

QUESTION: 98

The strongest reducing agent out of Na, K, Rb and Cs is

A.
Na
B.
Cs
C.
Rb
D.
K

Solution:

QUESTION: 99

A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame no distinctive colour is noted, which cation would be present?

A.
Be²⁺
B.
Ba²⁺
C.
Rb²⁺
D.
Ca²⁺

Solution:

QUESTION: 100

Which of the following is not a Lewis acid?

A.
BF₃
B.
AlCl₃
C.
FeCl₃
D.
PH₃

Solution:

QUESTION: 101

Which of the following is not linear?

A.
CO₂
B.
ClO₂
C.
I₃
D.
None of these

Solution:

QUESTION: 102

The boiling point of water is exceptionally high because

A.
There is covalent bond between H and O
B.
water molecule is linear
C.
Water molecules associate due to hydrogen bonding
D.
Water molecules is not linear

Solution:

QUESTION: 103

The pH of solutions A, B, C and D are respectively 9.5, 2.5, 3.5 and 5.5. The most acidic solution is

A.
A
B.
B
C.
C
D.
D

Solution:

QUESTION: 104

Species acting both as Bronsted acid and base is

A.
(HSO₄)⁻¹
B.
Na₂CO₃
C.
NH₃
D.
OH⁻¹

Solution:

QUESTION: 105

Ketones (R₁COR₂);R₁═R₂═alkyl group, can be obtained in one step by

A.
Hydrolysis of esters
B.
Oxidation of primary alcohols
C.
Oxidation of secondary alcohols
D.
Reaction of acid halides and alcohols

Solution:

QUESTION: 106

Which of the following reactant in the presence of AlCl₃ gives acetophenone?

A.
benzene and acetone
B.
phenol and acetone
C.
phenol and AcOH
D.
Benzene and AcCl

Solution:

QUESTION: 107

which of the following solution is not buffer?

A.
borax
B.
sodium chloride
C.
boric acid + borax
D.
potassium hydroxide

Solution:

QUESTION: 108

Conc.HNO₃ formsinpresenceof:

A.
conc.H₂SO₄
B.
Fe
C.
FeBr₃
D.
AlCl₃

Solution:

QUESTION: 109

In the following, electrophile is:
HO ― NO₂

A.
H^⊕
B.
C.
D.
OH^⊖

Solution:

QUESTION: 110

The addition of HBr to alkenes in the presence of peroxides is called :

A.
free radical addition reaction
B.
carbocation addition reaction
C.
nucleophilic addition reaction
D.
electrophilic addition reaction

Solution:

QUESTION: 111

In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?

A.
2
B.
4
C.
6
D.
8

Solution:

QUESTION: 112

Silicon combines with magnesium in an electric arc furnace between 2000K to 2500 k to produce

A.
MgSi
B.
MgSi₂
C.
Mg₂Si
D.
Mg₃Si

Solution:

QUESTION: 113

Which is not the resonance structure of aniline?

Solution:

QUESTION: 114

Which of the following is the second most abundant element in the earth's crust?

A.
carbon
B.
oxygen
C.
silicon
D.
nitrogen

Solution:

QUESTION: 115

The normality of a 2.3 M sulphuric acid solution is

A.
0.46 N
B.
0.23 N
C.
2.3 N
D.
4.6 N

Solution:

QUESTION: 116

The average osmotic pressure of human blood is 7.8 bar at 37ºC. What is the concentration of an aqueous NaCl solution that could be used in the blood stream?

A.
0.15 mol-L⁻¹
B.
0.30 mol-L⁻¹
C.
0.45 mol-L⁻¹
D.
0.60 mol-L⁻¹

Solution:

QUESTION: 117

The depression of freezing point is directly proportional to

A.
Mole fraction of the solution
B.
Molarity of the solution
C.
Molality of the solution
D.
Molarity of the solvent

Solution:

QUESTION: 118

Which of the following compounds can show optical isomerism?

A.
CH₃CH₂OH
B.
CH₂OHCHOHCH₂OH
C.
CH₃CHOHC₂H₅
D.
CCl₂F₂

Solution:

QUESTION: 119

Cuprous ion is colourless while cupric ion is coloured because

A.
Both have half filled p- and d-orbitals
B.
Cuprous ion has incomplete d-orbital and cupric ion has a complete d-orbital
C.
Both have unpaired electrons in the d-orbital
D.
Cuprous ion has a complete d-orbital and cupric ion has an incomplete d-orbital

Solution:

QUESTION: 120

If 0.5 mol of BaCl₂ is mixed with 0.2 mol of Na₃PO₄, the maximum number of mole of Ba₃(PO₄)₂ that can be formed is

A.
0.7
B.
0.5
C.
0.30
D.
0.10

Solution:

2 mol of Na₃PO₄ reacts with 3 mol of BaCl₂ to form 1 mol Ba₃(PO₄)₂
∴ 0.2 mol of Na₃PO₄ reacts with 0.3 mol of BaCl₂ to form 0.1 mol Ba₃(PO₄)₂.
Thus,Na₃PO₄ is limiting reagent here.

QUESTION: 121

Which of the following is superficial of the calf muscle ?

A.
gluteus
B.
trapezius
C.
latissimus
D.
gastrocnemius

Solution:

QUESTION: 122

Which of the following belongs to class Insecta?

A.
Julus
B.
Silverfish
C.
Lobsters
D.
Prawn

Solution:

QUESTION: 123

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Glucokinase is present in liver and muscle cells.
Reason (R): Glucokinase phosphorylates all types of hexoses.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 124

Best definition of birds is

A.
Warm blooded
B.
Feathered bipeds
C.
Animals with flight
D.
Feathered quadrepeds

Solution:

QUESTION: 125

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): When the ambient temperature is high and soil contains excess of water, the plants tend to lose water in the form of droplets from lenticels.
Reason(R): Root pressure regulates the rate of loss of water form lenticels.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

When the ambient temperature is high and soil contains excess water, the rate of transpiration is increased i.e. loss of water takes place from leaves through stomata.
Lenticular transpiration is only 0.1% of the total transpiration. It however continues day and night because lenticels have no mechanism of closure. The lenticels connect the atmospheric air with the cortical tissue of stem through intercellular spaces present amongst the complementary cells. Root pressure regulates the rate of loss of water from the stomata in some plants.

QUESTION: 126

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Coconut has wide distribution along the seashores.
Reason (R): It is dispersed by water.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 127

In the following questions, a statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the statements carefully and mark the answer-
Assertion (A): Mitochondria may store and release calcium when required.
Reason (R): In the presence of calcium, mitochondria phosphorylate no longer.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 128

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Holoblastic cleavage with almost equal sized blastomeres is a characteristic of placental animals.
Reason(R): Eggs of most mammals, including humans, are of centrolecithal type.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

In holoblastic cleavage the cleavage furrows bisect the entire egg, or in other words entire egg divides by each cleavage furrow in placental mammals having isolecithal or microlecithal egg the holoblastic cleavage produces blastomeres of equal or approximately equal size.
Centrolecithal eggs are found in insects and in some hydrozoa. Here yolk is concentrated at the centre of egg and the cytoplasm is present surrounding it. Meroblastic cleavage occurs in them.

QUESTION: 129

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Biotic community has higher position than population in ecological hierarchy.
Reason (R): Population of similar individual remains isolated in the community.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 130

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): When six molecules of carbon dioxide participate in photosynthesis, 12 molecules of NADPH+H⁺ and 18 ATP are used up, forming one hexose molecule.
Reason(R): The photosynthetic light reaction results in the formation of ATP and NADPH₂.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

When six molecules of carbon dioxide enter Calvin Cylce, one hexose molecule is formed, whereas 18ATP and 12 NADPH+H⁺ molecules are used up.
The light reaction of photosynthesis results in the formation of ATP and NADPH₂.

QUESTION: 131

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): In the descending limb of loop of Henle, the urnie is hypertonic, while in ascending limb of loops of Henle, the urine is hypotonic.
Reason(R): Descending limb is impermeable to Na⁺, while ascending limb is impermeable to H₂O.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

The loop of Henle, also called the nephron loop, is a U-shaped tube that extends from the proximal tubule. It consists of a descending limb and ascending limb.The descending limb is permeable to water and noticeably less impermeable to salt, and thus only indirectly contributes to the concentration of the interstitium. As the filtrate descends deeper into the hypertonic interstitium of the renal medulla, water flows freely out of the descending limb by osmosis until the tonicity of the filtrate and interstitium equilibrate. Longer descending limbs allow more time for water to flow out of the filtrate, so longer limbs make the filtrate more hypertonic than shorter limbs.Unlike the descending limb, the ascending limb of Henle's loop is impermeable to water, a critical feature of the countercurrent exchange mechanism employed by the loop. The ascending limb actively pumps sodium out of the filtrate, generating the hypertonic interstitium that drives countercurrent exchange. In passing through the ascending limb, the filtrate grows hypotonic since it has lost much of its sodium content. This hypotonic filtrate is passed to the distal convoluted tubule in the renal cortex.

QUESTION: 132

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Haemophilia is a recessive sex linked disease.
Reason(R): Haemophilia occurs due to mutation of a structural gene on chromosome 15.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

Haemophilia (also known as bleeder disease) is a popular example of sex linked inheritance in human beings. Haemophilia is either of two hereditary disorders in which the blood clots very slowly, due to a deficiency of either of two coagulation factors - haemophilia A, due to deficiency of factor VIII (antihaemophilic factor); or haemophilia B, due to deficiency of factor IX (Christmas factor). The patient may experience prolonged bleeding following any injury or wound, and in severe cases there is spontaneous bleeding into muscles and joints. Haemophilia is controlled by a sex-linked gene, which means that it is almost exclusively restricted to males; women can carry the disease - and pass it on to their sons - without being affected themselves. The genes encoding factors VIII and IX have been used in gene therapy trials for haemophilia.
Mutation of a structural gene on chromosome 15 is the molecular basis of Marfan syndrome. This disease is due to dominant mutation resulting in the production of abnormal form of connective tissues and characteristic extreme looseness of joints.

QUESTION: 133

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Agricultural output increased several tims after introduction of DDT.
Reason(R): DDT was the first insecticide used on a wide scale.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

DDT or dichloro-diphenyl trichloroethane was the first important synthetic pesticide discovered in 1939 by a Swiss chemist Paul Muller. It was toxic to wide range of insect pests yet appeared to have low toxicity to mammals. It was persistent which means it do not break down rapidly in the environment, so that it did not have to be reapplied often. DDT was so effective at killing pests and thus boosting crops yield and was so inexpensive to make that its use quickly spread over the globe. Farmers used more and more DDT throughout the 1950 and 1960 to get an increased yield of crop.

QUESTION: 134

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Low annual rainfall occurs in deserts.
Reason (R): Deserts may be hot or cold.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 135

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Companion cells control the sieve tube cell activities.
Reason (R): Companion cells possess nucleus.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 136

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Study of biology requires basic knowledge of chemistry and physics.
Reason(R): Living organisms are made up of atoms and molecules which follow chemical and physical laws.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

The field of biology is getting advanced day by day to such an extent that basci knowledge of physics, chemistry and other sciences is necessarily required.All the living organisms are made up of atoms and molecules which follow certain laws associated with them. Therefore it becomes essential to have the knowledge of chemical and physical sciences also.

QUESTION: 137

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): In apomixis, the plants of new genetic sequence are produced.
Reason(R): In apomixis, two individuals of same genetic sequence meet.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

Winkler defined apomixis as replacement of the normal sexual reproduction by asexual reproduction, without fertilization.Apomictically produced offspring are genetically identical to the parent plant.

QUESTION: 138

In the following questions, a statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the statements carefully and mark the answer-
Assertion (A): Leucoplasts give rise to other types of plastids.
Reason (R): Chromoplasts do not get changed to other types of plastids.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 139

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Diabetes insipidus is marked by excessive urination and too much thirst of water.
Reason(R): Anti-diuretic hormone (ADH) is secreted by the posterior lobe of pituitary gland.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

Anti-diuretic hormone (ADH) or vasopressin is a peptide hormone, synthesized in the hypothalamus and released by the posterior pituitary gland, that stimulates capillary muscles and reduces the flow of urine and increases its concentration. It is released in response to a fall in the water content of blood plasma and lead to an increase in the permeability to water of the distal and collecting tubules of the nephron. Deficiency or hyposecretion of ADH results in diabetes insipidus.
Diabetes insipidus is characterized by micturating dilute urine several times a dday which results in excessive thirst and dehydration.

QUESTION: 140

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Chloroplasts synthesise all protein which they require for photosynthesis.
Reason (R): Chloroplasts are semiautonomous and contain ribosomes.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is false but Reason is true.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 141

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Placenta bears ovules.
Reason (R): An ovary has one placenta.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is true but Reason is false.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 142

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the roots of all cereal and pulse crops.
Reason(R): A gene incorporated in the bacterial chromosomal genome gets automatically transferred to the crop with which the bacterium is associated.

A.
Both assertion and reason are true and reason is the correct explanation of assertion.
B.
Both assertion and reason are true but reason is not the correct explanation of assertion.
C.
Assertion is true but reason is false.
D.
Both assertion and reason are false.

Solution:

Agrobacterium tumefaciens is a gram negative , non-sporing, motile, rod-shaped bacteria closely related to Rhizobium It is found commonly around root surfaces. The region termed rhizosphere where it seems to survive by using nutrints from the root tissues. It infects only through the wound-site either naturally occuring or caused by transplanting of seeding and nursery stock.
It transfers DNA into plant genomes found in soil worldwide.Agrobacterium tumefaciens causes crown gall disease of a wide range of dicot plants especially members of rose family by transferring its own DNA into plant cells.But in laboratory, the ability to move all sorts of genes into plants has made the microbe the standard tool for investigating plant genetics and modifying crops.

QUESTION: 143

In a man normal glucose conc. increases to 190 mg/100ml. Which of the following will occur?

A.
Extra glucose will get deposited in form of ketone bodies
B.
Extra glucose is changed to glycogen and get stored in liver
C.
Extra glucose will be excreted by kidney
D.
All above

Solution:

QUESTION: 144

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Xylem and phloem are complex tissues.
Reason (R): Complex tissue is collection of different types of cells.

A.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B.
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C.
Assertion is false but Reason is true.
D.
Both Assertion and Reason are false.

Solution:

QUESTION: 145

The highest blood pressure in the aorta occurs when the

A.
Atria contract
B.
Heart muscle is relaxed
C.
Blood is pushed to the ventricle
D.
Blood is pumped from the heart

Solution:

QUESTION: 146

Anaerobic process, after glycolysis, is called

A.
TCA
B.
Calvin cycle
C.
Kerb's cycle
D.
Fermentation

Solution:

QUESTION: 147

Products of the liver include

A.
Pepsin, gastrin and bile
B.
Bile, proteases and urea
C.
Bile, urea and blood proteins
D.
Proteases, amylases andlipase.

Solution:

QUESTION: 148

Radio tracer techniques show that DNA is in

A.
multi helix stage
B.
single helix stage
C.
double helix stage
D.
none of these

Solution:

QUESTION: 149

Flax fibers belong to

A.
Linum usitatissimum
B.
Crotalaria juncea
C.
Cocos nucifera
D.
Cannabis sativa

Solution:

QUESTION: 150

Germinating barley seeds are used in the production of

A.
rum
B.
wine
C.
beer
D.
cheese

Solution:

QUESTION: 151

Triticale is the hybrid between wheat and

A.
maize
B.
barley
C.
rye
D.
bean

Solution:

QUESTION: 152

Which one is correctly matched with its specificity for an amino acid, start or stop in protein synthesis

A.
UCG-start
B.
UUU-stop
C.
UGU-Leucine
D.
UAC-Tyrosine

Solution:

QUESTION: 153

Man was originated in which era?

A.
paleocene
B.
miocene
C.
pliocene
D.
oligocene

Solution:

QUESTION: 154

Gene and cistron are sometimes used as synonyms because

A.
One gene contains one cistron
B.
One gene contains many cistrons
C.
One gene contains no cistrons
D.
One cistron contains many genes

Solution:

QUESTION: 155

F₂ generation is produced by

A.
Crossing F₁ progeny with one of the parents
B.
Selfing the progeny of two individual parents
C.
Selfing the parents
D.
Recessive cross between individual parents

Solution:

QUESTION: 156

Immunoglobin found in serum is

A.
IgG
B.
IgA
C.
IgM
D.
IgN

Solution:

QUESTION: 157

A late acting dominant disorder is

A.
Tay-sach's disease
B.
Polydactyly
C.
Huntington's chorea
D.
Phenylketonuria

Solution:

QUESTION: 158

The inflorescence of Onion is

A.
Cyme umbel
B.
Racemose umbel
C.
Corymb
D.
Catkin

Solution:

QUESTION: 159

Vaccines produced through geneticengneering are safe as

A.
They contain antigen only from coat of pathogen
B.
They are least active form of virus
C.
They are attenuated form of pathogen
D.
All the above

Solution:

QUESTION: 160

Basis of vaccination was discovered by

A.
Salk
B.
Kohler
C.
Landsteiner
D.
Pasteur

Solution:

QUESTION: 161

An Rh⁻ individual receives Rh⁺ blood. The recipient becomes

A.
Sterile
B.
Dead
C.
No reaction
D.
Isoimmunised

Solution:

QUESTION: 162

Which of the following is an ammonifying bacteria ?

A.
Clostridium
B.
Azotobacter
C.
Nitrosococcus
D.
Bacillus remosus

Solution:

QUESTION: 163

Bacteria lack alternation of generation as they

A.
Lack distinct chromosomes
B.
Lack both syngamy and meiosis
C.
Involve exchange of genetic material
D.
Lack conjugation

Solution:

QUESTION: 164

Maximum starch is manufactured by

A.
Spongy parenchyma
B.
Palisade parenchyma
C.
Guard cells
D.
Vascular tissue

Solution:

QUESTION: 165

Bordeaux mixture is a fungicide, which consists of

A.
magnesium hydroxide + water
B.
copper sulphate + calcium hydroxide
C.
copper sulphate + sodium hydroxide
D.
magnesium sulphate + calcium hydroxide

Solution:

QUESTION: 166

Companion cells are usually seen associated with

A.
Fibres
B.
Tracheids
C.
Vessels
D.
Sieve tubes

Solution:

QUESTION: 167

Plastocyanin contain

A.
Mo
B.
Fe
C.
Cu
D.
Zn

Solution:

QUESTION: 168

The specific function of light energy in the process of photosynthesis is to

A.
Activate chlorophyll
B.
Split water
C.
Reduce carbon dioxide
D.
Synthesize glucose

Solution:

In Photosystem I, light energy activates electrons of the Photosystem II pigments. These pigments transfer the energy of their excited electrons to a special Photosystem II chlorophyll molecule, P680, that absorbs light best in the red region at 680 nanometers.

QUESTION: 169

A function of enzymes is to

A.
emulsify fats
B.
Carry information to nerves
C.
Catalyze chemical reactions
D.
Maintain constant blood pH

Solution:

QUESTION: 170

Which of the following hormones does not promote homeostasis?

A.
Insulim
B.
Oxytocin
C.
Calcitonin
D.
Antidiuretic hormone

Solution:

QUESTION: 171

Which of the following are the most diversed molecules in the cell ?

A.
lipids
B.
protein
C.
carbohydrates
D.
mineral salts

Solution:

QUESTION: 172