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AIIMS Full Mock Test 2

200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Full Mock Test 2

Description

This mock test of AIIMS Full Mock Test 2 for NEET helps you for every NEET entrance exam. This contains 200 Multiple Choice Questions for NEET AIIMS Full Mock Test 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Full Mock Test 2 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Full Mock Test 2 exercise for a better result in the exam. You can find other AIIMS Full Mock Test 2 extra questions, long questions & short questions for NEET on EduRev as well by searching above.

QUESTION: 1

Large transformers, when used for some time, become hot and are cooled by circulating oil. The heating of transformer is due to

A.
heating effect of current alone
B.
hysteresis loss alone
C.
Both the hysteresis loss and heating effect of current
D.
None of the above

Solution:

QUESTION: 2

A capacitor of capacity C₁ charged to V volt is connected to an uncharged capacitor of capacity C₂. The final potential difference across each will be

A.
C₂ V/C₁ + C₂
B.
C₁ V/C₁ + C₂
C.
(1 + C₁/C₂)V
D.
(1 - C₁/C₂)V

Solution:

QUESTION: 3

The e/m value of electron is

A.
1.6 x 10¹¹CKg⁻¹
B.
1.6 x 10¹⁹ CKg⁻¹
C.
1 x 759 x 10¹¹ CKg⁻¹
D.
9 x 1 x 10⁻³¹ CKg⁻¹

Solution:

QUESTION: 4

A 5 Kg body moving at 10 ms^-1 strikes a 20Kg body at rest. The collision is inelastic and the 5Kg body comes to rest and the 20Kg body is set into motion. The velocity of the second body is

A.
2.5 ms^-1 in the same direction of motion
B.
10 ms^-1 in the original direction of motion
C.
5 ms^-1 in the direction of motion
D.
5 ms^-1 in the opposite direction of motion

Solution:

QUESTION: 5

If a wire of resistance R is melted and recasted to half of its length, then the new resistance of the wire will be

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

Solution:

QUESTION: 6

If the no. of turns per unit length of the coil of a solenoid is doubled kepping other dimensions same, then its self-inductance will be

A.
halved
B.
doubled
C.
four times
D.
eight times

Solution:

QUESTION: 7

The core of a transformer is laminated so that

A.
Ratio is increased
B.
Rusting of core may be stopped
C.
Energy losses due to eddy currents be reduced
D.
Change in flux is increased

Solution:

QUESTION: 8

If the kinetic energy of an electron doubles, its de-Broglie's wavelength changes by a factor

A.
2
B.
√2
C.
1/2
D.
1/√2

Solution:

QUESTION: 9

What is the de Broglie wavelength of the α-particle accelerated through a potential difference V

A.
0.287/√V
B.
12.27/√V
C.
0.101/√V
D.
0.202/√V

Solution:

QUESTION: 10

Dual nature of radiation is shown by

A.
Diffraction and reflection
B.
Refraction and diffraction
C.
Photoelectric effect alone
D.
Photoelectric effect and diffraction

Solution:

QUESTION: 11

A photocell stops emission if it is maintained at 2V negative potential. The energy of most energetic photoelectron is

A.
2eV
B.
2J
C.
2kJ
D.
2keJ

Solution:

QUESTION: 12

What is the value of inductance L for which the current is a maximum in series LCR circuit with
C = 10μF and ω = 1000s⁻¹?

A.
100mH
B.
1mH
C.
10 mH
D.
Cannot be calculated unless R is known

Solution:

QUESTION: 13

Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon

A.
currents in the coils
B.
materials of the wires of the coils
C.
relative position and orientation of the coils
D.
rates at which the currents are changing in the coils

Solution:

QUESTION: 14

When light travels from air to water, which parameter does not change?

A.
wavelength
B.
frequency
C.
velocity
D.
all of these

Solution:

QUESTION: 15

The capacitance of an isolated spherical conductor of radius 15 cm is

A.
1.7 x 10¹¹F
B.
3.4 x 10¹¹F
C.
5.1 x 10¹¹/F
D.
6.8 x 10¹¹F

Solution:

QUESTION: 16

The capacities of three capacitors are in ratio 1 : 2 : 3. Their equivalent capacity when connected in parallel is more than that when they are connected in series. The individual capacities of capacitors in μF are

A.
4, 6, 7
B.
1, 2, 3
C.
2, 3, 4
D.
1, 3, 6

Solution:

QUESTION: 17

Two masses of 1 gm and 4 gm are moving with equal kinetic energies. The ratio of the magnitudes of their linear momentum is

A.
4 : 1
B.
√2 : 1
C.
1 : 2
D.
1 : 16

Solution:

QUESTION: 18

Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is

A.
3K
B.
4/3 K
C.
2/3 K
D.
none of these

Solution:

QUESTION: 19

If the stone is thrown up vertically and return to ground, its potential energy is maximum

A.
During the upward journey
B.
At the maximum height
C.
During the return journey
D.
At the bottom

Solution:

QUESTION: 20

An electric kettle has two heating elements. One brings it to boil in ten minutes and the other in fifteen minutes. If two heating filament are connected in parallel, the water in kettle will boil in

A.
6 minutes
B.
8 minutes
C.
25 minutes
D.
5 minutes

Solution:

QUESTION: 21

In a deflection magnetometer experiment in tan A position, a short-bar magnet placed at 18 cm from the centre of the compass needle produces a deflection of 30º. If another magnet of same length but 16 times pole strength as that of first magnet is placed in tan B position at 36cm, the deflection will be

A.
0º
B.
30º
C.
45º
D.
60º

Solution:

QUESTION: 22

An elastic material with Young's modulus 'Y' is subjected to a tensile stress 'σ'. The elastic potential energy stored per unit volume of the material is

A.
Yσ/2
B.
σ²/Y
C.
σ²/2Y
D.
σ/2Y

Solution:

QUESTION: 23

The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are 1 wb m^-2 and 150 Am^-1 respectively. The relative permeability of iron is (μ₀ = 4π x 10^-7 Henry / m)

Solution:

We know that B = μH = μ₀μ_rH
Where μ₀ = permeability of free space or air μ_r = relative permeability

QUESTION: 24

The resultant of two forces 3P and 2P is R. If the first force is doubled then the resultant is also doubled. The angle between the two forces is

A.
60º
B.
120º
C.
70º
D.
180º

Solution:

QUESTION: 25

The radioisotope, tritium (₁H³) has a life-life of 12.3 years. If the initial amount of tritium is 32 mg, how many milligrams of it would remain after 49.2 years?

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

Solution:

QUESTION: 26

A spring is stretched by 10 cm when a mass of 1 kg is hanged from it. Now, with the same mass if the spring is pulled and then released, then its time period is 9g = 10 m/s²)

A.
π/5
B.
2π/5
C.
π/10
D.
π

Solution:

QUESTION: 27

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: 28

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: 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): A wire of length L metre, carrying a current 1 ampere is bent in the form of a circle. Its magnitude of magnetic moment will be 4πIL².
Reason(R): Magnetic moment = Area of coil X Current .

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: 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): A 4Ω resistance wire is bent in the middle by 180º and both the halves are twisted with each other. The new resistance is 1Ω.
Reason(R): On twisting the parts they will be connected in parallel.

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: 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): When charges are shared between two bodies, there occurs loss of energy.
Reason(R): In case of sharing of charges, conservation of energy fails.

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

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 ozone layer protects us from harmful effects of ultraviolet radiations.
Reason(R): Ozone layer reflects back the harmful ultraviolet radiations.

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 Assertoion and Reason are false.

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): If a projectile explodes in air in different parts, the path of centre of mass remains unchanged.
Reason(R): During the explosion no external force acts on the C.O.M.

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

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 photocell is called an electric eye.
Reason(R): When light is incident on some semiconductor its electrical resistance is reduced.

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: 36

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): When a ball is thrown upwards, its momentum first decreases and then increases.
Reason(R): Law of conservation of momentum is not followed is this process.

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 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: 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): P-T graphs of all gases at low density meet at only one point called absolute zero.
Reason(R): Absolute zero is less than 0ºC in a celsius scale.

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):β-particles are those electrons that were revolving around the nucleus of the atom.
Reason(R):β-particles have the same charge as that of electron.

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: 40

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 inner walls of the fluorescent tubes painted with cadmium borate produce pink light.
Reason(R): Fluoroscent substances on being illuminated by low-frequency light emit light of high-frequency .

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: 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 changing magnetic field acts as a source of electric field known as induced electric field.
Reason(R): Induced electric field can be produced by any static charge distribution.

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: 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): The workdone in pushing a block is more than the work done in pulling the block in a rough surface.
Reason(R): In the pushing condition normal reaction is more.

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): In the tempered scale, the ratio of frequencies between all successive notes is 1.059.
Reason (R): In equal tone temperament, the octave is divide into twelve exactly equal intervals.

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: 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): Hot wire instrument is based on the principle of heating effect of current.
Reason(R): Only A.C. can be measured by hot-wire instrument.

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: 45

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 planet move faster, when it is closer to the sun in its orbit and vice-versa.
Reason(R): Orbital velocity in an orbit of planet is constant.

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): In a nuclear reactor uranium rods are covered by close-fitting aluminium cylinders.
Reason(R): Aluminium protects one from injurious radiations.

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: 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

Two projectiles are fired at different angles with the same magnitude of velocity, such that they have the same range. At what angles they might have been projected?

A.
25º and 65º
B.
35º and 75º
C.
10º and 50º
D.
none of these

Solution:

For equal range, the particle should either be projected at an angle θ or (90 - θ)

QUESTION: 49

Under minimum deviation condition in a prism, if a ray is incident at an angle 30º , the angle between the emergent ray and the refracting surface of the prism is

A.
0º
B.
30º
C.
45º
D.
60º

Solution:

QUESTION: 50

In a Huygen's eye piece with an eyepiece of focal length F, the distance between the eye-piece and field lens should be

A.
2/3 F
B.
F
C.
2F
D.
3F

Solution:

QUESTION: 51

Two light waves having the same wavelength and same amplitude but having a constant phase difference with time are known as

A.
Coherent
B.
Transverse
C.
Longitudinal
D.
Stationary

Solution:

QUESTION: 52

Which statement is correct?

A.
n-type germanium is negatively charged and p-type germanium is positively charged
B.
n-type germanium is positively charged and p-type germanium is negatively charged
C.
both n-type and p-type germainum are neutral
D.
both n-type and p-type germainum are negatively charged

Solution:

QUESTION: 53

In the forward bias arrangement of a p-n junction diode

A.
The n-end is connected to the positive terminal of the battery
B.
The p-end is connected to the positive terminal of the battery
C.
The direction of current is from n-end to p-end in the diode
D.
The p-end is connected to the negative terminal of battery

Solution:

QUESTION: 54

When a current is passed through a junction of two dissimilar metals, heat is evolved or absorbed at the junction. This process is called

A.
Joules effect
B.
Peltier effect
C.
Seebeck effect
D.
Thomson effect

Solution:

QUESTION: 55

If the acceleration due to gravity is 10ms⁻² and the units of length and time are changed in kilometer and hour respectively, the numerical value of the acceleration is

A.
360000
B.
72,000
C.
36,000
D.
129600

Solution:

QUESTION: 56

Ratio of intensities of two waves is given by 4 : 1. Then, ratio of the amplitudes of the two waves is

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

Solution:

QUESTION: 57

The physical quantity having the same dimensions as Planck's constant 'h' is

A.
force
B.
linear momentum
C.
Boltzman's constant
D.
angular momentum

Solution:

QUESTION: 58

A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of slit is

A.
Zero
B.
π
C.
π2
D.
2 π

Solution:

QUESTION: 59

Light was producing interference have their amplitudes in the ratio 3:2. The intensity ratio of maximum and minimum of interference fringes is

A.
36:1
B.
9:4
C.
25:1
D.
6:4

Solution:

QUESTION: 60

Yoe lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2m. In this process you take 5 seconds. The work done by you will depend upon

A.
Mass of the book and time taken
B.
Weight of the book and height of the book shelf
C.
Height of the book-shelf and time taken
D.
Mass of the book, height of the book-shelf and time taken

Solution:

QUESTION: 61

How many isomers of C₅H₁₁OH will be primary alcohols?

A.
5
B.
2
C.
4
D.
3

Solution:

QUESTION: 62

In which of the following, resonance will be possible?

A.
CH₂ = CH-CH₂-CHO
B.
CH₂ = CH-CH = O
C.
CH₃COCH₃
D.
CH₂ = CH-CH₂-CH = CH₂

Solution:

QUESTION: 63

Assuming full decomposition, the volume of CO₂ released at STP on heating 9.85 g of BaCO₃ (At. mass Ba = 137) will be

A.
0.84 L
B.
0.24 L
C.
4.06 L
D.
1.12 L

Solution:

QUESTION: 64

Which of the following is formed when toluene reacts with fuming nitric acid?

A.
nitrobenzene
B.
nitrotoluene
C.
p-nitrotoluene
D.
TNT

Solution:

Nitration of toluene using fuming HNO₃ and conc. H₂SO₄ gives Trinitrotoluene

QUESTION: 65

Aromatic compounds undergo

A.
Nucleophilic addition reaction
B.
Electrophilic addition
C.
Electrophilic substitution
D.
None of these

Solution:

QUESTION: 66

The correct order of reactivity towards the electrophilic substitution of the compounds ,aniline (I),benzene (II) and nitrobenzene (III),is

A.
II > III > I
B.
I < II > III
C.
I > II > III
D.
III > II > I

Solution:

QUESTION: 67

The compound used as refrigerant is

A.
CCl₄
B.
COCl₂
C.
CF₄
D.
CCl₂F₂

Solution:

QUESTION: 68

Which of the following gas changes lime water in milky colour?

A.
carbon dioxide
B.
carbon monoxide
C.
nitrogen dioxide
D.
hydrogen sulphide

Solution:

QUESTION: 69

Which of the follwoing structure is expected to have three bond pairs and one lone pair around the central atom?

A.
Tetrahedral
B.
Pyramidal
C.
Trigonal planar
D.
Octahedral

Solution:

QUESTION: 70

The rate constant for the first and zero reactions in terms of molarity, M units respectively

A.
sec⁻¹, M sec⁻¹
B.
sec⁻¹, M
C.
M sec⁻¹, sec⁻¹
D.
M, sec⁻¹

Solution:

QUESTION: 71

For reaction a A→xP, when [A] = 2.2mM, the rate was found to be 2.4m M s⁻¹. On reducing concentration of A to half, the rate changes to 0.6mM s⁻¹. The order of reaction with respect to A is

A.
1.5
B.
2.0
C.
2.5
D.
3.0

Solution:

QUESTION: 72

Plants and living beings are the examples of

A.
open system
B.
closed system
C.
isolated system
D.
adiabatic system

Solution: Becoz they are not able to control their body temprechure their body temprechure depends on environmental temprechure.

QUESTION: 73

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: 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): In the addition of Grignard reagent to carbonyl compound, the R group of RMgX attacks carbonyl carbon.
Reason(R): The carbon-magnesium bond of the Grignard reagent is highly polar, carbon being negative relative to electropositive magnesium.

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): S_(N)1 mechanism is facilitated by polar protic solvents like water, alcohol etc.
Reason(R):C₆H₅CH(C₆H₅)−Br is less stable than C₆H₅CH(CH₃)Br in S_(N)1 reactions.

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):Carbondioxide has greater value of root mean square velocity V_(rms) than Carbon monoxide.
Reason(R): V_(rms) is directly proportional to molar mass.

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: 77

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): BaSO₄ is highly insoluble in water but readily dissolves in a solution of the sodium salt of ethylene-diamine-tetracetic acid.
Reason(R): Ba²⁺ forms a very stable complex with the anion of the sodium salt of ethylene-diamine-tetra-acetic acid. Which is soluble in 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.
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:

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): Boiling points of carboxylic acids increase regularly with increasing molecular weight.
Reason(R): Carboxylic acids are known to form dimers due to hydrogen bonding .

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: 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.
Both Assertion and Reason are false.

Solution:

QUESTION: 83

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 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: 85

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

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: 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): Alums are isomorphs.
Reason (R) : The existence of different compounds with similar chemical compositions in same crystalline form is called isomorphism.

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

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: 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): In the Joule-Thomsom expansion of hydrogen and helium, the temperature of the gases increases.
Reason(R): These gases have very high inversion temperature.

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: 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): The 19th electron in potassium atom enters into the 4s orbital and not 3d.
Reason (R): n+1 rule is followed for determining the orbitals of lowest energy state.

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: 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): KCl/NaCl/NH₄Cl etc. cannot be used in the salt bridge of a cell containing silver.
Reason(R): A salt bridge contains concentrated solution of an inert electrolyte like KCl, KNO₃, K₂SO₄ etc. or solidified solution of such an electrolyte in agar-agar and gelatine.

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

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): Ag⁺, H⁺ i.e., simple cation behaves as Lewis acid.
Reason(R): Lewis acids are those which are capable of furnishing H⁺ ions in aqueous solution.

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

Time required to deposit one milli mole of aluminium metal by the passage of 9.65 amperes through aqueous solution of aluminium ions is

A.
30 s
B.
10 s
C.
30,000 s
D.
10,000 s

Solution:

QUESTION: 94

At constant pressure the volume of the fixed mass of ideal gas is directly proportional to

A.
Absolute temperature
B.
Degree centigrade
C.
Degree Fahrenheit
D.
None of these

Solution:

QUESTION: 95

The unit of specific conductivity is

A.
ohm cm⁻¹
B.
ohm cm⁻¹
C.
ohm⁻¹cm
D.
ohm⁻¹cm⁻¹

Solution:

QUESTION: 96

A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

A.
Sodium atoms
B.
Sodium hydride
C.
Sodium amide
D.
Solvated electrons

Solution:

QUESTION: 97

Which of the following alkali metal hydroxides is the strongest base?

A.
LiOH
B.
NaOH
C.
KOH
D.
CsOH

Solution:

QUESTION: 98

Leblanc process is employed in the manufacture of

A.
Baking soda
B.
Washing soda
C.
Potash
D.
Plaster of Paris

Solution:

QUESTION: 99

Consider the following reaction : 6 NaOH + 3Cl₂ → 5 NaCl + A + 3H₂O.
What is the oxidation number of chlorine in "A"?

A.
+ 5
B.
- 1
C.
+ 3
D.
+ 1

Solution:

QUESTION: 100

Group-2 elements are

A.
oxidising agents
B.
reducing agents
C.
oxidising as well as reducing agents
D.
neither oxidising nor reducing agents

Solution:

QUESTION: 101

The pH of 10 M HCl aqueous solution is

A.
less than 0
B.
zero
C.
2
D.
1

Solution:

QUESTION: 102

pH of 10 M solution of HCl is

A.
1
B.
0
C.
2
D.
less than 0

Solution:

QUESTION: 103

Pure water can be obtained from sea water by

A.
Centrifugation
B.
Plasmolysis
C.
Reverse osmosis
D.
Sedimentation

Solution:

QUESTION: 104

Identify the indicator used to titrate Na₂CO₃ solution with HCl

A.
phenolphalein
B.
Cresol red
C.
Methyl orange
D.
None

Solution:

QUESTION: 105

Fear or excitement, generally cause on to breathe rapidly and it result in the decrease of CO₂ concentration in blood. In what way will it change the pH of blood

A.
pH will increase
B.
pH will decrease
C.
No change
D.
pH will adjust to 7

Solution:

QUESTION: 106

Which alkene is formed from the following yield carbonyl pair ?
CH₃CH₂CH₂CH = PPh₃ + 2-Butanone

A.
3-Methyl-3-heptene
B.
4-Methyl-3-heptene
C.
5-Methyl-3-heptene
D.
1-Methyl-5-methane

Solution:

QUESTION: 107

Which gives more stable product ?

A.
1,2-addition
B.
1,4-addition
C.
Both of these
D.
None of these

Solution:

QUESTION: 108

Which of the following compounds can react with the Lewis base Cl⁻ in a Lewis acid-base reaction?

A.
CH₄
B.
AlCl₃
C.
OH^-
D.
CH₃⁻

Solution:

QUESTION: 109

Reduction of cyclohex-2-enone with aluminium isopropoxide in excess of isopropyl alcohol will produce

A.
cyclohexanol
B.
cyclohex-2-enol
C.
cyclohexanone
D.
Benzene

Solution:

QUESTION: 110

Conc. HNO₃ forms in presence of :

A.
conc. H₂SO₄
B.
Fe
C.
FeBr₃
D.
AlCl₃

Solution:

QUESTION: 111

Following step is : CH₃CH₃ + Cl → CH₃CH₂ + HCl

A.
chain initiation
B.
chain propagation
C.
chain termination
D.
chain disproportionation

Solution:

QUESTION: 112

p-type silicon is formed by adding a minute amount of an element with

A.
six valence electrons
B.
four valence electrons
C.
five valence electrons
D.
three valence electrons

Solution:

QUESTION: 113

Quartz is a crystalline variety of

A.
silica
B.
silicon
C.
silicon carbide
D.
sodium silicate

Solution:

QUESTION: 114

The structure of rock salt is

A.
fcp
B.
bcc
C.
ccp
D.
hcp

Solution:

QUESTION: 115

If 10 ml of concentrated H₂SO₄ (18 M) is diluted to one litre, then strength of the dilute acid would be (basicity of H₂SO₄ = 2)

A.
0.18 N
B.
0.36 N
C.
0.09 N
D.
18 N

Solution:

QUESTION: 116

If 5.85 g of NaCl is dissolved in 90 g of water, the molar fraction of solute is

A.
0.1
B.
0.2
C.
0.019
D.
0.01

Solution:

QUESTION: 117

Osmotic pressure of a solution is 0.0821 atm at a temperature of 300 K. The concentration in mole/litre will be

A.
0.33
B.
0.066
C.
0.3 X 10⁻²
D.
3

Solution:

QUESTION: 118

An example of an alkane molecule with least number of carbon atoms which is optically active is:

A.
2-Methyl pentane
B.
3-Methyl pentane
C.
3-Methyl hexane
D.
3-Methyl heptane

Solution:

QUESTION: 119

If 75.5g of a metallic chloride contains 35.5g of chlorine, then the equivalent weight of the metal is

A.
20
B.
30
C.
40
D.
50

Solution:

QUESTION: 120

When CuSO₄ solution is added to K₄[Fe(CN)₆] the formula of the product formed is?

A.
Cu₂Fe(CN)₆
B.
KCN
C.
Cu(CN)₃
D.
Cu(CN)₂

Solution:

QUESTION: 121

Sandfly is

A.
Glossina
B.
Blatta
C.
Phlebotomus
D.
Panstrongylus

Solution:

QUESTION: 122

In singing birds, the sound is produced by the:

A.
Lungs
B.
Air sacs
C.
Syrinx
D.
Larynx

Solution: Syrinx vocal box of birds,without any skin fold capable to produce more than one sound at a tym.while in larynx of mammals skin folds are requires.

QUESTION: 123

Red cell count is carried out by

A.
Haemocytometer
B.
Haemoglobinometer
C.
Sphyganomanometer
D.
Electrocardiogram

Solution:

QUESTION: 124

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): Localised growth in plants is due to meristems.
Reason (R): The meristems remain in formative phase.

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: 125

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): Sigmoid growth curve consists of four parts.
Reason (R): Lag phase is called as grand phase of growth.

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: 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): Pea seeds are nonphotoblastic.
Reason (R): Nonphotoblastic seeds can germinate in absence of light only.

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 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): The tap root develops from the radicle.
Reason (R): Radicle represents root pole of the embryo.

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): Rhoeo leaves contain anthocyanin pigments in epidermal cells.
Reason(R): Anthocyanins are accessory photosynthetic pigments.

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:

Anthocyanin is a colouring pigment of certain higher plants that imparts a bluish or reddish colour.
Rhoeo leaves contain anthocyanin pigments in epidermal cells.

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): The hair of cotton has lignin thickening.
Reason (R): In aerial parts, epidermal hair serves for defence.

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: 130

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): Plankton and necton organisms show presence of weak locomotory organisms.
Reason (R): Benthom organisms show well developed locomotary organs.

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: 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): Co-enzyme is a non-protein group without which certain enzymes are inactive or incomplete.
Reason(R): Co-enzymes not only provide a point of attachment of the chemical group being transformed but also influence the properties of the 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.
Both assertion and reason are false.

Solution:

Activity of enzymes is dependant on the structure of proteins, addition of nonprotein and cofactor. The cofactor may be either a metal ion or a complex organic molecule called a coenzyme usually function as intermediary carriers of electrons or of specific atoms or functional groups that are transferred in the overall enzymatic reaction.

QUESTION: 132

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): Decomposers are present at benthom of aquatic ecosystems.
Reason (R): The consumers of lakes are different at different depths of lakes.

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: 133

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): Cyclic pathway of photosynthesis first appeared in some eubacterial species.
Reason (R): Oxygen started accumulating in the atmosphere after the noncyclic pathway of photosyn-the-sis evolved.

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: 134

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): The 'absorption spectrum' of chlorophyll 'a' shows close correlation with its action spectrum'.
Reason(R): Chlorophyll 'a' is present in both the pigment systems I and II.

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:

An absorption spectrum is a measure of the extent to which a given substance absorbs the light of different colours or wavelengths. An action spectrum is the measure of the efficiency of a process induced by light of different wavelengths but of the same intensity. It is actually a plot of the extent of a response (such as photosynthesis) against different wavelengths of light. A comparison of an action spectrum with the absorption spectrum of a pigment indicates whether or not the pigment is involved in the response. For example, the absorption spectrum of chlorophyll a is very similar to the action spectrum of photosynthesis in most plant tissues. Although, light energy is absorbed by chlorophylls as well as by other accessory pigments, only chlorophyll a is involved in photosystem I and II.

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): Glycolysis occurs by a series of 10 enzymes.
Reason (R): Glycolysis occurs in mitochondria.

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): The fungi are widespread in distribution and they even live on or inside other plants and animals.
Reason(R): Fungi are able to grow anywhere on land, water or on other organisms because they have a variety of pigments, including chlorophyll, carotenoids, fucoxanthin and phycoerythrin.

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:

Fungi occur in a variety of habitats (ubiquitous). Most of them are moisture loving and terrestrial and few are aquatic. They may be epiphytic (i.e., grow on other plants e.g, Armillaria), symbiotic (i.e., live in an association with other plants e.g., lichens, mycorrhiza), saprophytic (i.e., grow on dead organic matter e.g., Mucor), predacious (i.e., eat other organisms e.g., Dactylella) and parasitic (i.e., Erysiphe, Phytophthooa etc.). Fungi are achlorophyllous i.e., they do not have chlorophyll hence, cannot photosynthesize. They are heterotrophic in nutrition and show absorptive type of nutrition.

QUESTION: 137

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): On the basis of photoperiod, some parts are called shortlong day plants (S-LDP) and some are called long-short day plants.
Reason (R): Florigen controls the photoperiodism in plants.

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: 138

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:

During a wound germs are removed by the process of phagocytosis by WBCs. WBCs accumulate at the site of wound by diapedesis. Diapedesis is the sqeezing of leucocytes out from the endothelium of capillaries to fight against foreign agent.

QUESTION: 139

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): Chlorophyll a is an universal plastid in autotrophic plants.
Reason (R): P₇₀₀ and P₆₈₀ are types of chlorophyll a.

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: 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): Carnivorous plants are autotrophic in nature.
Reason (R): Carnivorous plants are green plants.

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: 141

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 morula stage, the cells divide without any increase in size.
Reason(R): Zona pellucida remains undivided till cleavage is complete.

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:

After fertilization the zygote undergoes a number of mitotic divisions known as cleavage. Cleavage produces a solid ball of small blastomeres. Th embryo now looks like a mulberry and is known as morula.Cleavage restores the cell size and nucleocytoplasmic ratio characteristic of the species.
Zona pellucida is a glycoprotein layer found in eggs of mammals. It remains undivided till the cleavage is complete.Blastocyst is a product of cleavage and is surrounded by zona pellucida.

QUESTION: 142

Which of the following is not a carbohydrate?

A.
Cellulose
B.
Chitin
C.
Maltose
D.
Pepsin

Solution:

QUESTION: 143

The respiratory enzymes are located in

A.
Mitochondrial matrix
B.
Perimitochondrial space
C.
Cristae
D.
Outer membrane

Solution:

QUESTION: 144

A blood vessel which has numerous valves is a(n)

A.
Vein.
B.
Artery
C.
Arteriole
D.
Capillary

Solution:

QUESTION: 145

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): Totipotency can be easily demonstrated in plant cells.
Resaon (R): In higher animals it has not yet been experimentally proved.

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.
Assertion is true but Reason is false.

Solution:

QUESTION: 146

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): Interferons are a type of antibodies produced by body cells infected by bacteria.
Reason(R): Interferons stimulate inflammation at the site of injury.

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:

Interferons are not antibodies.These are defence proteins that are produced by body cells that are infected by a virus. They travel to nearby cells and prevent the spread of the virus.
Cells that have been infected produce chemical called histamine. This chemical causes the blood capillaries to dilate (get wider) and become more porous. As a result the area swells, gets red, becomes warm, and is painful. This results in more white blood cells coming to the area to fight the infection. If the inflammation happens over the whole body we get a fever. The fever is the body’s way to combat bacteria and viruses. The higher temperature inhibits the pathogen from reproducing.Interferons do not stimulate inflammation at the site of injury.

QUESTION: 147

Epiglottis is meant for protecting

A.
Oesophagus from entry of food
B.
Nasal chambers from entry of food
C.
Larynx from entry of food
D.
Teeth from caries

Solution:

QUESTION: 148

2,4-D is an effective

A.
fungicide
B.
weedicide
C.
rodenticide
D.
wormicide

Solution:

QUESTION: 149

When a natural predator (living being) is applied on some other organism to control them, this process is called

A.
artificial control
B.
genetic engineering
C.
biological control
D.
confusion technique

Solution:

QUESTION: 150

The first ever experimental evidence showing DNA as genetic material in bacteriophages came from the studies of :

A.
Beadle and Tatum
B.
Weismann
C.
Hershey and Chase
D.
Schleiden and Schwann

Solution:

QUESTION: 151

Juniper berries are used for the chief flavouring agents for

A.
gins
B.
beer
C.
vodka
D.
aperitifs

Solution:

QUESTION: 152

Modern Man differs from apes in

A.
Protruding eyes
B.
Sparse body hair
C.
Arms shorter than legs
D.
Wearing of clothes

Solution:

QUESTION: 153

Which of the following cuts DNA from specific places ?

A.
phosphatase
B.
ligase
C.
exonuclease
D.
restriction endonuclease

Solution:

QUESTION: 154

Echerichia coli is allowed to replicate once in medium having radioactive thymidine. Which one is correct

A.
Both strands of DNA become redioactive
B.
One strand becomes radioactive
C.
Each strand is half radioactive
D.
None is radioactive

Solution:

QUESTION: 155

Vaccination protects a person from disease because it

A.
Helps in better digestion
B.
Increases RBC count
C.
Produces antibodies
D.
Corrects body heating system

Solution:

QUESTION: 156

Queen Victoria was carrier of haemophilia, a sex-linked disease. What is true ?

A.
Queen's father must have had haemophilia
B.
All her daughters would have been carriers
C.
All of her sons would have had haemophilia
D.
Haemophilia would have occured more in her male than female descendants

Solution:

QUESTION: 157

Treatment of snake bite by antivenine is providing

A.
Artificial acquired active immunity
B.
Artificial acquired passive immunity
C.
Natural acquired passive immunity
D.
SpecificnNatural acquired immunity

Solution:

QUESTION: 158

Interferons act against viral infection by

A.
Protecting other cells against virus
B.
Functioning as macrophages
C.
Providing antibodies
D.
Directly destroying genetic material of virus

Solution:

QUESTION: 159

When both alleles express their effect on being present together, the phenomenon is called

A.
Dominance
B.
Codominance
C.
Pseudodominance
D.
Amphidominance

Solution:

QUESTION: 160

In cyathium the ratio between female to male flowers is

A.
One : One
B.
One : Many
C.
Many : One
D.
Many : Many

Solution:

QUESTION: 161

Which is introduced during small pox vaccination?

A.
Antibodies
B.
Leucocytes
C.
Antibiotics
D.
Attenuated virus

Solution:

QUESTION: 162

Diphtheria is due to

A.
Poison released by living bacteria
B.
Poison released by dead bacteria
C.
Poison released by virus
D.
Excessive immune response

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

The main function of cerebrospinal fluid is

A.
Nourishment of brain and spinal cord
B.
Functioning as cushion against shocks
C.
Keeping the central nervous system moist
D.
All of the above

Solution:

QUESTION: 165

Determine ΔG^- for the following reaction.

A.
-257.033 kJ
B.
+201.033 kJ
C.
-157.33 kJ
D.
+257.033 kJ

Solution:

QUESTION: 166

Which is not required for synthesis of carbohydrates

A.
Chlorophyll
B.
Water
C.
Nitrogen
D.
Carbon dioxide

Solution:

QUESTION: 167

Mycorrhiza acts as

A.
Mechanical tissue
B.
Root hair in adverse conditions
C.
Modified root
D.
Organ for vegetative propagation

Solution:

QUESTION: 168

Root hairs develop from

A.
Exodermis
B.
Exodermal cells
C.
Epidermis
D.
Epidermal cells

Solution:

QUESTION: 169

Sieve tubes are suited for translocation of food because they possess

A.
bordered pits
B.
no ends walls
C.
broader lumen and perforated cross walls
D.
no protoplasm.

Solution:

Sieve tubes are suited for translocation of food because they possess broader lumen and perforated cross walls. Sieve tubes are elongated tubular conducting channels of phloem. The end wall possesses many small pores and have thin cellulosic wall.

QUESTION: 170

An essential process connected with photosynthesis is

A.
Photolysis of water
B.
Synthesis of glucose
C.
Breakdown of glucose
D.
Photophosphorylation

Solution:

QUESTION: 171

Fertilisers added to fresh water will cause

A.
Death of plants
B.
Decrease in fish population
C.
Increase in aquatic animals
D.
Eutrophication

Solution: Fertilizer increase BOD of water body that's why eutrophication occur.

QUESTION: 172

Protein specificity is due to

A.
Type of amino acids
B.
Sequence of amino acids
C.
Time of synthesis
D.
Quantity

Solution:

QUESTION: 173

The area where pollen tube develops is

A.
Stigmatic papillae
B.
Ovule