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AIIMS Full Mock Test 3

200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Full Mock Test 3

Description

This mock test of AIIMS Full Mock Test 3 for NEET helps you for every NEET entrance exam. This contains 200 Multiple Choice Questions for NEET AIIMS Full Mock Test 3 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Full Mock Test 3 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Full Mock Test 3 exercise for a better result in the exam. You can find other AIIMS Full Mock Test 3 extra questions, long questions & short questions for NEET on EduRev as well by searching above.

QUESTION: 1

A device which converts electrical energy into mechanical energy is

A.
Dynamo
B.
Generator
C.
Electric motor
D.
Induction coil

Solution:

QUESTION: 2

Continuous emission spectrum is produced by

A.
incandescent electric lamp
B.
mercury vapour lamp
C.
sodium vapour lamp
D.
the sun

Solution:

QUESTION: 3

Three condenser of capacity C each are joined first in series and then in parallel. The capacity becomes n times, where n is

A.
3
B.
6
C.
9
D.
12

Solution: In first case when they are connected in series their equivalence is C/3 and in parallel that is 3C so 3C is 9times of C/3

QUESTION: 4

A ball is dropped from a height h to the ground. If the coefficient of restitution is 'e' the height to which the ball goes up after it rebounds for nth time is

A.
e²h
B.
eⁿh
C.
e²ⁿh
D.
eⁿh²

Solution:

QUESTION: 5

Two resistors whose value are in ratio 2 : 1 are connected in parallel with one cell. Then ratio of power dissipated is

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

Solution:

QUESTION: 6

If an electron and a photon propagate in the form of waves having the same wavelength, it implies that they have the same

A.
energy
B.
velocity
C.
momentum
D.
angular momentum

Solution:

QUESTION: 7

What will be the ratio of de-Broglie wavelengths of proton and α− particle of same energy

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

Solution:

QUESTION: 8

The pH of the mixture obtained when equal volumes of N/10 NaOH and N/20 HCI are mixed, is

A.
1.6
B.
12.4
C.
13.4
D.
10.8

Solution:

QUESTION: 9

An electron of charge 'E' is liberated from a hot filament and attracted by an anode of potential 'V' volts positive with respect to the filament. The speed of the electron of mass m when it strikes the anode is

A.
EV
B.
mEV
C.
√2E/mV
D.
√2 EV/m

Solution:

QUESTION: 10

The working of a dynamo is based on principle of

A.
Conversion of energy into electricity
B.
Magnetic effects of current
C.
Electromagnetic induction
D.
Heat effects of current

Solution:

QUESTION: 11

If the no. of turns of a solenoid are doubled and its length is halved keeping the area of cross-section same, then ratio of initial and final self-inductances will be

A.
4:1
B.
1:4
C.
1:8
D.
8:1

Solution:

QUESTION: 12

An L.C. circuit contains 10 mH inductor and a 25 μF capacitor. The resistance of the circuit is negligible. The energy stored in the circuit is completely magnetic at time (in milli seconds) being measured from the instant when the circuit is closed

A.
1.57,4.71,7.85
B.
1.57,3.14,4.71
C.
0,1.57,4.71
D.
None of these

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.
Q/√3
C.
Q/√2
D.
Q

Solution:

QUESTION: 14

The fact that radiosignals reach the earth from outside the atmosphere, was discovered accidently by

A.
K.G.Jansky
B.
Millikan
C.
Aryabhatta
D.
Prof. Kanu

Solution:

QUESTION: 15

There is an electric field E in x-direction. If the work done on moving a charge of 0.2 C through a distance of 2 m along a line making an angle 60° with x-axis is 4 J, then what is the value of E?

A.
3 N/C
B.
4 N/C
C.
5 N/C
D.
20 N/C

Solution:

QUESTION: 16

An electric dipole is kept in a uniform electric field. It experiences

A.
both a net force and a torque
B.
only a net force but no torque
C.
only a torque but no net force
D.
neither a net force nor a torque

Solution:

QUESTION: 17

If the linear momentum is increased by 50%, the kinetic energy will increase by

A.
50%
B.
100%
C.
125%
D.
25%

Solution:

QUESTION: 18

Two bodies of mass m₁ and m₂ have equal kinetic energies. If p₁ and p₂ are their respective momentum, then ratio p₁ : p₂ is equal to

A.
m₁ : m₂
B.
m₂ : m₁
C.
√m₁ :√m₂
D.
none of these

Solution:

QUESTION: 19

Two circular discs A and B with equal radii are blackened. They are heated to same temperature and are cooled under identical conditions. What inference do you draw from their cooling curves?

A.
A and B have same specific heats.
B.
Specific heat of A is less.
C.
Specific heat of B is less.
D.
Nothing can be said.

Solution:

QUESTION: 20

A ferromagnetic material is heated above its Curie temperature. Which one is a correct statement ?

A.
Ferromagnetic domains are perfectly arranged
B.
Ferromagnetic domains becomes random
C.
Ferromagnetic domains are not influenced
D.
Ferromagnetic material changes into diamagnetic material

Solution:

QUESTION: 21

Two 220 volt, 100 watt bulbs are connected first in series and then in parallel. Each time the combination is connected to a 220 V a.c., supply line. The power drawn by the combination in each case respectively will be

A.
50 W, 100W
B.
100 W, 50W
C.
200 W, 150W
D.
50 W, 200W

Solution:

QUESTION: 22

The magnetic lines of force inside a bar magnet

A.
do not exist
B.
are from north-pole to south-pole of the magnet
C.
are from south-pole to north-pole of the magnet
D.
depend upon the area of cross-section of the bar magnet

Solution:

QUESTION: 23

According to the Hooke's law, if stress is increased, then ratio of stress to strain

A.
increases
B.
decreases
C.
becomes zero
D.
remains constant

Solution:

QUESTION: 24

An object with a mass of 10 kg moves at a constant velocity of 10m/s. A constant force then acts for 4 sec on the object and gives it a speed of 2m/sec in opposite direction. The acceleration produced in it is,

A.
3 m/sec²
B.
-3 m/sec²
C.
0.3 m/sec²
D.
-0.3 m/sec²

Solution:

QUESTION: 25

In radioactive decay, the emitted electrons come from

A.
nucleus of the atom
B.
the orbital with principal quantum number
C.
inner orbital of atoms
D.
the outermost shell of atom

Solution:

QUESTION: 26

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 light goes from a medium of refraction index 1.5 to a medium of refraction index, 1.6, its speed decreases by 1.875 * 10⁸ m/s.
Reason(R): Refraction index = speed of light in vacuum speed of light in air

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: 27

One of the two clocks on the earth is controlled by a pendulum and other by a spring. If both the clocks are taken to the moon, then which clock will have same time period as that on the earth?

A.
spring clock
B.
pendulum clock
C.
both '1' and '2'
D.
neither '1' nor '2'

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): A steady current flows in a metallic coductor of non-uniform cross-section. Only drift a speed remains constant along the length of the conductor.
Reason(R): vs = one A (symbols have their usual meaning).

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): Nuclei having number about 60 are most stable.
Reason(R): When two or more light nuclei are combined into a heavier nucleus, then the binding energy per nucleon will increase.

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

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): Water at 4^oC will overflow from a filled container both on heating as well cooling.
Reason(R): Process of regelation is responsible for the expansion of water at 4^oC.

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): Two parallel wires carrying current in the same direction attract each other.
Reason(R): Two similar charges moving parallel to each other in same direction repel 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: 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): For stable equilibrium, Force has to be zero and potential energy should be minimum.
Reason(R): For equilibrium, it is not necessary that the force is not 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: 34

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): Thermistor is a device to detect small change in temperature.
Reason(R): The magnitude of the temperature coefficient of resistivity is often quite large for semiconducting material.

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: 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): Current is passed through a metallic wire heating it red. When cold water is poured on half of its portion, the rest of half portion becomes more hot.
Reason(R): Resistance decreases due to decrease in temperature and then current through wire increases.

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

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 the string of a descending lift is broken, then it will fall down like a free body.
Reason(R): The acceleration of a free body is always 'g'.

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): If a body is not in rest position then the net external force acting on it cannot be zero.
Reason(R): If a body is moving with uniform speed it will continue doing so unless frictional force exceeds the force of motion.

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: 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): 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: 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): Radioactive substances emit both α and β-particles simultaneously.
Reason(R): Any radioactive substance does not have a single element only, but all those elements which are being formed by radioactive emission are present in it.

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: 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): 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: 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): 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: 43

If the de Broglie wavelengths for a proton and for a α-particle are equal, then the ratio of their velocities will be

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

Solution:

QUESTION: 44

The drift velocity of the electron is doubled if the applied electric field across the conductance is halved.
Reason(R): Drift velocity ∝ 1 Electric field

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 are Reason are false.

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): 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: 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): The principle of homogeneity of dimensions state that dimensions on both sides of equation must be same
Reason (R) : An equation which is dimensionally correct is also practically correct

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: 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

If intensity of incident light is increased in PEE then which of the following is true

A.
Maximum K.E. of ejected electron will increase
B.
Stopping potential will decrease
C.
Work function will remain unchanged
D.
Maximum K.E. of ejected electron will decrease

Solution:

QUESTION: 49

According to Einstein's photoelectric equation, the plot of the kinetic energy of the emitted photoelectrons from a metal versus frequency of the incident radiation gives a straight line, whose slope

A.
is same for all metals and independent of the intensity of the radiation
B.
depends both upon the intensity of radiation and the metal used
C.
depends upon the nature of the metal used
D.
depends upon the intensity of the radiation

Solution:

QUESTION: 50

The working of a dynamo is based on principle of

A.
Conversion of energy into electricity
B.
Magnetic effects of current
C.
Heat effects of current
D.
Electromagnetic induction

Solution:

QUESTION: 51

A particle reaches its highest point when it has covered exactly one half of its horizontal range. The correspponding point on the displacement time graph is characterised by

A.
Negative slope and zero curvature
B.
Zero slope and negative curvature
C.
Zero slope and positive curvature
D.
Positive slope and zero curvature

Solution:

QUESTION: 52

Doping of a semiconductor (with small traces of impurity atoms) generally changes the resistivity as follows:

A.
Decreases
B.
Does not alter
C.
May increase or decrease depending on the dopant
D.
Increases

Solution:

QUESTION: 53

In an unbiased p-n junction, holes diffuse from the p-region to n-region because

A.
free electrons in the n-region attract them.
B.
they move across the junction by the potential difference.
C.
hole concentration in p-region is more as compared to n-region.
D.
all the above.

Solution:

In an unbiased p-n junction, hole concentration in p-region is more than in n-region and due to difference in concentration of charge carriers, holes diffuse from p-region to n-region.

QUESTION: 54

The neutral temperature is the mean of the temperatures of

A.
inversion and cold junction
B.
inversion and hot junction
C.
cold junction and hot junction
D.
inversion, cold and hot junctions

Solution:

QUESTION: 55

The study of forces and their effect on the objects is studied under

A.
statics
B.
kinematics
C.
mechanics
D.
modern physics

Solution:

QUESTION: 56

Unit of stress are

A.
N/m
B.
N - m
C.
N/m²
D.
N - m²

Solution:

QUESTION: 57

What is the effect on the interference fringes in a Young's double slit experiment, if the monochromatic source is replaced by another monochromatic source of shorter wavelength?

A.
Fringe width increases
B.
Fringe width decreases
C.
Interference pattern disappears
D.
No effect

Solution:

QUESTION: 58

Soap bubble looks coloured due to

A.
dispersion
B.
reflection
C.
interference
D.
any one of these

Solution:

QUESTION: 59

Two coherent light beams of intensity I and 4I are superposed. The maximum and minimum possible intensities in the resulting beam are

A.
5I and I
B.
5I and 3I
C.
9I and I
D.
9I and 3I

Solution:

QUESTION: 60

A car travelling at a speed of 30 km/hr is brought to a halt in 8 m by applying brakes. If the same car is travelling at 60 km/hr, it can be brought to a halt with the same braking force in

A.
8 m
B.
32 m
C.
16 m
D.
24 m

Solution:

QUESTION: 61

Which of the following processes is employed to convert alkyl halide into alcohol?

A.
Addition
B.
Substitution
C.
Dehydrohalogenation
D.
Molecular rearrangement

Solution:

QUESTION: 62

A solution of 10 mL of M/10 FeSO₄ was titrated with KMnO₄ solution in acidic medium, the amount of KMnO₄ used will be

A.
5 mL of 0.1 M
B.
10 mL of 0.1 M
C.
10 mL of 0.5 M
D.
10 mL of 0.02 M

Solution:

QUESTION: 63

The hydrogen phosphate of certain metal has formula MHPO₄. The formula of metal chloride would be

A.
MCl
B.
MCl₂
C.
M₂Cl₂
D.
MCl₃

Solution:

QUESTION: 64

Which of the following is formed when toluene reacts with a mixture of concentrated nitric acid and concentrated sulphuric acid?

A.
nitrobenzene
B.
nitroaniline
C.
nitrotoluene
D.
trinitrotoluene

Solution:

QUESTION: 65

The ortho/para directing group among the following is

A.
― COOH
B.
― CN
C.
― COCH₃
D.
― NHCOCH₃

Solution:

QUESTION: 66

In graphite, the electrons are

A.
localised on each C-atom
B.
present in anti-bonding orbital
C.
localised on every third C-atom
D.
spread out between the structure

Solution:

QUESTION: 67

The most reactive compound for electrophilic nitration is

A.
Benzene
B.
Nitrobenzene
C.
Benzoic acid
D.
Toluene

Solution:

QUESTION: 68

Freon is used as a

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

Solution:

QUESTION: 69

Among the following compounds, which has a dipole moment greater than zero?

A.
CCl₄
B.
BF₃
C.
HF
D.
C₆H₆

Solution:

QUESTION: 70

Which of the following statements about the catalyst is true?

A.
A catalyst accelerates the rate of reaction by bringing down the energy of activation
B.
A catalyst does not participate in reaction mechanism
C.
A catalyst makes the reaction more feasible by making ∆G more negative
D.
A catalyst makes equilibrium constant more favourable for forward reaction

Solution:

QUESTION: 71

The order of reaction is decided by

A.
temperature
B.
mechanism of reaction as well as relative concentration of reactants
C.
molecularity
D.
pressure

Solution:

QUESTION: 72

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: 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): 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: 74

Calculate Δ H in KJ for the following reaction Cs + O₂g → CO₂g Given that
H₂Og + Cg → COg + H₂g , ΔH = + 131 kJ
COg + 12O₂g → CO₂g , ΔH = − 282 kJ
H₂g + 12O₂g → H₂Og , ΔH = − 242 k J

A.
− 393
B.
+ 393
C.
+ 655
D.
− 655

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): If two moles of AgNO₃ and 2 moles Cu are reacted , then AgNO₃ is the limiting reactant.
Reason(R): AgNO₃ is left in excess and copper is consumed fully.

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: 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): Critical temperature is the temperature at which the real gas exhibits ideal behaviour for considerable range of pressure.
Reason(R): At critical temperature, the densities of a substance in gaseous and liquid states are same.

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

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):But-2-ene shows geometrical isomerism but but-1-ene does not show.
Reason(R):Geometrical isomersim arises due to the restricted rotation of the double bond.

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

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): [CO(en)₃]Cl₃ complex is more stable than [CO(NH₃)₆]Cl₃ complex.
Reason(R): Ethylenediamine is a bidentate ligand.

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

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): Molarity is a convenient concentration unit.
Reason(R): Number of moles of solution can be calculated with ease No.of moles = Volume of solution Moles of solution 1L solution

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: 80

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 mixture of the solutions of a weak acid and its sodium salt acts as a good buffer.
Reason(R): The ratio of the sale to acid in the mixture does not change substantially when small amounts of acids or alkalies are added to the buffer.

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: 81

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: 82

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): Black body radiation and photoelectric effect were limitations of electromagnetic wave theory.
Reason (R): Planck's quantum theory explained them.

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): The ease of dehydration of alcohols follows the order. Primary>Secondary>Tertiary.
Reason(R): Dehydration proceeds through the formation of oxonium ions.

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

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): CH₃COOH but not HCOOH can be halogenated in presence of red P and Cl₂.
Reason(R): Both formic acid and CH₃COOH are highly 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 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

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): Ethyl xanthate is used as a collector in floatation process.
Reason(R): Collectors depress the floatation property of one of the components of the ore and thus help in the separation of different minerals present in the same ore.

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

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): Aniline is stronger base than ammonia.
Reason(R): In aniline electron density decreases at nitrogen due to mesomeric effect.

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

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

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

The e.m.f. of a galvanic cell with electrode potentials of silver equal to + 0.80 V and that of copper equal to + 0.34 V is

A.
- 0.46 V
B.
- 1.14 V
C.
+0.46 V
D.
+1.14 V

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

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): Methyl isocyanide can be hydrolysed by acids but not by alkalies.
Reason(R): The carbon atom of isocyanide group in methyl isocyanide carries a negative charge which readily accepts the proton but repels the OH^- ion.

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: 94

Which one of the following types of Laser is used in Laser Printers?

A.
Semiconductor laser
B.
Excimer Laser
C.
Dye Laser
D.
Gas Laser

Solution:

QUESTION: 95

The molecular weight of methane is 16. If the pressure of this gas changes from 1 atm to 2 atm, then volume occupied by 1.6 g of this gas will be

A.
0.56 litre
B.
1.12 litre
C.
2.24 litres
D.
4.48 litres

Solution:

QUESTION: 96

Sodium burns in air and gives

A.
Na₃N
B.
NaO₂
C.
NaO
D.
Na₂O₂

Solution:

QUESTION: 97

An aqueous solution of sodium carbonate is alkaline because sodium carbonate is a salt of

A.
Weak acid and weak base
B.
Strong acid and weak base
C.
Weak acid and strong base
D.
Strong acid and strong base

Solution:

QUESTION: 98

Which of the following compounds is used in gun powder?

A.
NaNO₃
B.
KNO₃
C.
LiNO₃
D.
None

Solution:

QUESTION: 99

Which one of the following oxides of chlorine is obtained by passing dry chlorine over silver chlorate at 90^oC?

A.
Cl₂O
B.
ClO₃
C.
ClO₂
D.
ClO₄

Solution:

QUESTION: 100

The solubility AgCl will be minimum in

A.
0.001 M AgNO₃
B.
pure water
C.
0.01 M CaCl₂
D.
0.01 M NaCl

Solution:

QUESTION: 101

Neutralization reaction in water is best represented by

A.
NaOH + HCl → NaCL + H₂O
B.
OH⁻ + H⁺ → H₂O
C.
OH⁻ + H₃O⁺ → 2H₂O
D.
Na⁺ + Cl⁻ → NaCl

Solution:

QUESTION: 102

The concept that acid is proton donor and base is proton acceptor was given by

A.
Arrhenius
B.
Lowry-Bronsted
C.
Lewis
D.
Faraday

Solution:

QUESTION: 103

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: Because Be have no colour in Bunsen flame.

QUESTION: 104

Which of the following solution cannot act as a buffer ?

A.
NaH₂PO₄ + H₃PO₄
B.
CH₃COOH + CH₃COONa
C.
HCl + NH₄Cl
D.
H₃PO₄ + NaH₂PO₄

Solution:

QUESTION: 105

The percentage by weight of hydrogen in H₂O₂ is

A.
5.88
B.
6.25
C.
25
D.
50

Solution:

QUESTION: 106

Clemmensen reduction of a ketone is carried out in presence of

A.
H₂ with Pd as catalyst
B.
Glycol with KOH
C.
Zn-Hg with HCl
D.
None of these

Solution:

QUESTION: 107

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: 108

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction. What will be the final product when cyclohex-2-enone is selectively reduced in MPV reaction ?

A.
Cyclohexanol
B.
Cyclohex-2-enol
C.
Cyclohexanone
D.
Benzene

Solution:

QUESTION: 109

Which gives more stable product ?

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

Solution:

QUESTION: 110

Which does not contain conjugate system?

A.
CH₂ ═ CH ― CH ═ CH₂
B.
CH₂ ═ CHCHO
C.
CH₃CH ═ CH₂
D.

Solution:

In dienes, when the double bonds connected to each other by a single bond, this arrangement is known as conjugated.

QUESTION: 111

Which is not the resonance structure of aniline?

Solution:

QUESTION: 112

Ultra-silicon is prepared by the process of

A.
zone-refining
B.
sublimation
C.
crystallisation
D.
fractional distillation

Solution:

QUESTION: 113

Which type of glass has a property to cut off ultra-violet rays?

A.
hard glass
B.
pyrex glass
C.
crook's glass
D.
soft glass

Solution:

QUESTION: 114

Which one of the following solutions would produce maximum elevation in B.P. ?

A.
0.1 M glucose
B.
0.2 M surcose
C.
0.1 M BaCl₂
D.
0.1 M MgSO₄

Solution:

QUESTION: 115

Schottky defect is observed in the crystal of

A.
NaCl
B.
TlCl
C.
AgCl
D.
MgCl₂

Solution:

QUESTION: 116

One of the following is false for Hg?

A.
It can evolve hydrogen from H₂S
B.
It is metal
C.
It has high specific heat
D.
It is less reactive than hydrogen

Solution:

QUESTION: 117

The ratio of the value of any colligative property for KCl solution to that of sugar solution is nearly

A.
1
B.
0.5
C.
2
D.
2.5

Solution:

QUESTION: 118

Which of the following 0.10 m aqueous solutions will have lowest freezing point ?

A.
KCl
B.
Al₂(SO₄)₃
C.
C₆H₁₂O₆
D.
C₁₂H₂₂O₁₁

Solution:

QUESTION: 119

Geometric isomerism will be exhibited by

A.
1-Pentene
B.
3-Methyl-1-butene
C.
2-Pentene
D.
All of these compounds

Solution:

In this compound both the carbon atoms bonded by the double bond have two different group attached to them

QUESTION: 120

If 30 g of Mg and 30 g of oxygen are reacted, then the residual mixture contains

A.
40 MgO + 20 g O₂
B.
45 g MgO + 15 g O₂
C.
50 g MgO + 10 g O₂
D.
60 g MgO only

Solution:

QUESTION: 121

Ligament connects

A.
Muscle to skin
B.
Bone to bone
C.
Muscle to muscle
D.
Muscle to bone

Solution:

QUESTION: 122

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): Thick cuticle is mostly present in disease resistant plants.
Reason(R): Disease causing agents cannot grow on cuticle and cannot invade the cuticle.

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 transformation of cellulose or pectic substances of the primary or secondary wall into cutin, which forms a continuous layer, called the cuticle. It generally forms the skin or outermost covering of the stem, leaves and some fruits. A thick cuticle layer serves as a barrier against fungal disease. Cuticle play a structural barrier and it contain substances of high wax content which the fungus finds difficult to penetrate.

QUESTION: 123

Pneumatic bones, four chambered heart and feathers occur in

A.
Cyclostomata
B.
Aves
C.
Mammalia
D.
Reptilia

Solution:

QUESTION: 124

Eggs of Anopheles are found

A.
singly with air floats
B.
singly without air floats
C.
in rafts with air floats
D.
in rafts without air floats

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): Severe Acute Respiratory Syndrome (SARS) originated in China.
Reason(R): China is the most poulated country of the world.

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:

Severe Acute Respiratory Syndrome (SARS) a severe acute type of pneumonia caused by metapneumo virus was first reported in China.
Though China is the most populated country of the world it is not directly responsible for the origin of SARS. The killer pneumonia virus is responsible for SARS origin.

QUESTION: 126

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): Endomycorrhiza of forest trees contribute to the efficient nutrient cycling in tropical forest ecosystems.
Reason(R): The fungi that form endomycorrhizal associations with plants store nutrient ions and make them available to the host 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:

The fungi of endotrophic mycorrhiza invade the cells of the root cortex, with a portion lying externally as a loose mass of hyphae in the soil. These mycorrhizas are found in the families of Ericales, Orchidaceae and Gentiaceae. Mycorrhizas cause considerable stimulation to groth in nutrient deficient soils.The greatest stimulation occurs in the uptake of phosphates. Mycorrhizas can take up phosphate at that low concentrations at which they are unavailable to non-mycorrhizal roots.

QUESTION: 127

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): Adenine cannot pair with cytosine.
Reason(R): Because there would be two hydrogen atoms one at the bonding positions and one at the other.

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 purine and pyrimidine bases pair only in certain combinations. Adenine pairs with thymine (A:T) and guanine with cytosine (G:C). Adenine and thymine are joined by two hydrogen bonds ( A ═ T ) Cytosine and guanine are joined by three hydrogen bonds ( G ≡ C ) through positions 6', 1' and 2'.

QUESTION: 128

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): Extra whorl of calyx is called epicalyx.
Reason (R): Epicalyx is present as inner series of calyx.

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: 129

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): WBCs accumulate at the site of wounds by diapedesis.
Reason(R): It is the squeezing of leucocytes from the endothelium.

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: 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): Generally the intraspecific competition is more intense than interspecific competition.
Reason (R): Intraspecific competition occurs when the resources are in short supply.

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: 131

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: 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): In a food chain members of successive higher levels are fewer in number.
Reason(R): Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.

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 a parasitic food chain the pyramids are always inverted. This is due to the fact that a single plant may support the growth of many herbivores and each herbivore in turn may provide nutrition to several parasites there is a reverse position, which means the number of organisms gradually show an increase.

QUESTION: 133

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 ionizing radiations can have direct effect on chromosomes. They may directly break chromosomes or alter one of the DNA bases or indirectly may initiate a chain of chemical reactions. The biological effect also depends on the kind of cell and stage of nuclear cycle.

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): The main function of suspensor is to provide nutrition to embryo.
Reason (R): It is attached to embryo by hypophysis.

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: 135

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 alcoholic drink, the alcohol is converted into glucose in the liver.
Reason(R): Liver cells are able to produce glucose from alcohol by back fermentation.

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:

Absorbed alcohol is carried directly to the liver, where it becomes the preferred fuel. Use of moderate amounts of alcohol does not cause liver damage provided adequate nutrition is maintained. The liver becomes enlarged yellow greasy and firm.Hepatocytes are distended by large fat globules which push the hepatocyte nucleus against the cell membrane. Accumulation of fat in the liver of the alcoholic person results from the combination of impaired fatty acid oxidation, increased uptake and esterification of fatty acids to form triglycerides and diminshed lipoprotein biosynthesis and secretion, it means there is increase in the fat synthesis in the liver.

QUESTION: 136

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): Cytochromes are only found in mitochondria.
Reason (R): Cytochrome b 5 occurs in the endoplasmic reticulum.

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: 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): 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: 138

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): Old age is not an illness. It is a continuation of life with decreasing capacity for adaptation.
Reason(R): Cessation of mitosis is a normal genetically programmed event.

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:

Old age is the result of ageing or senescence which may be defined as the progressive deterioration in structure and function of the body cells, tissues, organs and organ systems of the organism with their advancing age.In old age the body's immune system loses its ability to effectively deal with the antigens. This reduces the resistance as well as adaptation of the body.
Cessation of mitosis is not as such a genetically programmed event. During ageing, there is a decrease in multiplication of cells though it differs in various tissues.

QUESTION: 139

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): Piper nigrum shows the presence of perisperm.
Reason (R): The persistent nucellus is called perisperm.

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: 140

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:

Pollution is an undesirable change in thephysical, chemical or biological characteristics of our air, water and land that may or will harmfully affect human lives or other organism. Pollution can be natural or man made. Natural pollution comes from volcanic reuptions, emission of natural gas, soil erosion, ultraviolet rays, etc. Most of the pollution is man-made. Contamination occurs due to the presence of harmful organisms or their porducts or undesirable porducts in a desirable product causing disease or discomfort, for the organism who consume it. Therefore pollution and contamination are two different things.

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): DNA code is not copied in the synthesis of transfer RNA.
Reason(R): Transfer RNA move out of the nucleus and after attaching on the ribosomes, form the template.

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:

tRNA is synthesized in the nucleus as a DNA template. Only 0.025% of DNA codes for tRNA. tRNA is an exception to other cellular RNAs in that a part of its ribonucleotide sequence (-CCA) is added after it comes off the DNA template tRNA is formed from only a small part of DNA molecule. Therefore, it does not show any obvious base relationship to DNA.

QUESTION: 142

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): Natural germination inhibitors do not affect the viability of seeds.
Reason (R): Natural germination inhibitors may be found inside as well as outside of the seed.

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: 143

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:

Adrenalin is a catecholamine hormone,a lso known as epinephrine, secreted by the mammalian adrenal medulla as well as the adrenergic nerve endings. Its secretion is stimulated by the sympathetic nervous system under conditions of stress.
Adrenaline stimulates blood flow to skeletal muscles and increases blood glucose levels. It also raises metabolic rate.

QUESTION: 144

Cellulose occurs in

A.
Tunicates
B.
Cell membrane
C.
Cell wall
D.
Both A and C

Solution:

QUESTION: 145

R.Q. is more than one in case of-

A.
Fat
B.
Fructose
C.
Glucose
D.
Organic acid

Solution:

QUESTION: 146

Which of the following can fix atmospheric nitrogen?

A.
Albugo
B.
Cystopus
C.
Saprolegnia
D.
Anabaena

Solution:

QUESTION: 147

Nucleotide on hydrolysis does not give :

A.
purines
B.
amino acids
C.
pyrimidines
D.
pentose sugar

Solution:

QUESTION: 148

The function of the nodes in the lymphatic system is to

A.
Filter debris
B.
Produce platelets for clotting
C.
Break down worn-out red blood cells
D.
Help maintain a constant blood pressure

Solution:

QUESTION: 149

Which of the following are liver waste products?

A.
bilirubin
B.
bile salts
C.
cholesterol
D.
electrolytes

Solution:

QUESTION: 150

The flax fibres are obtained from

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

Solution:

QUESTION: 151

A gene which synthesises a repressor protein is

A.
Operator gene
B.
Structural gene
C.
Promoter gene
D.
Regulator gene

Solution:

QUESTION: 152

Which one is correct

A.
Australopithecus is real ancestor of man
B.
Homo erectus is real ancestor of man
C.
Neanderthal man is direct ancestor Homo sapiens
D.
None of the above

Solution:

QUESTION: 153

Manipulation of DNA in genetic engineering became possible due to the discovery of

A.
primase
B.
transcriptase
C.
DNA ligase
D.
restriction endonuclease

Solution:

QUESTION: 154

Cocaine is obtained from

A.
Erythroxylum
B.
Strychnos
C.
Chrysanthemum
D.
Atropa

Solution:

QUESTION: 155

Red:Pink:white is an example of

A.
epistasis
B.
incomplete dominance
C.
codominance
D.
pleiotropy

Solution:

QUESTION: 156

In Drosophilia the XXY constitution determines

A.
Maleness
B.
Femaleness
C.
Intersex
D.
Both (a) and (c)

Solution:

QUESTION: 157

Humoral immunity is due to

A.
T-lymphocytes
B.
L-lymphocytes
C.
P-lymphocytes
D.
B-lymphocytes

Solution:

QUESTION: 158

Some bacteria are not easily killed because of

A.
Their tolerant power
B.
Chitinous wall
C.
Capsule and endospore formation
D.
Mesosomes

Solution:

QUESTION: 159

Segments of antigen that are recognised by antibody are

A.
Memory regions
B.
Epitopes
C.
Nondeterminants
D.
Self limitation

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

Resistance against disease is provided by

A.
Antigens
B.
Immunoglobulins
C.
Histamine
D.
HLA proteins

Solution:

QUESTION: 162

Rh factor is named after

A.
Monkey
B.
Drosphila
C.
Rat
D.
Man

Solution:

QUESTION: 163

Sulphur is absorbed by plants as

A.
SO₃ from soil
B.
SO₂ from air
C.
SO₄ from air
D.
Both B and C

Solution:

QUESTION: 164

Main substance involved in transfer of electrons in photosynthesis is

A.
Phytochrome
B.
Cytochrome
C.
FAD
D.
Both A and B

Solution:

QUESTION: 165

The law of limiting factors for photosynthesis was enunciated by

A.
R.Hill
B.
Calvin
C.
Krebs
D.
Blackman

Solution:

QUESTION: 166

The scientist to isolate streptomycin for the first time is

A.
Fleming
B.
Burkholder
C.
Waksman
D.
Pasteur

Solution:

QUESTION: 167

The speed of a nerve impulse along a sensory neuron depends on the

A.
dendrites.
B.
Cell bodies
C.
Myelin sheath
D.
Sensory receptors

Solution:

QUESTION: 168

Mule is product of

A.
breeding
B.
mutation
C.
hybridization
D.
interspecific hybridization

Solution:

QUESTION: 169

Basic difference between vessel and tracheid is in

A.
Types of pits
B.
Thickness and lignification
C.
Perforations of end walls
D.
Function

Solution:

QUESTION: 170

Sclereids belong to

A.
Collenchyma
B.
Xylem
C.
Sclerenchyma
D.
Sclerenchyma fibres

Solution:

QUESTION: 171

Minamata and itai-itai are caused by pollution of

A.
Mercury and Lead
B.
Mercury and Cadmium
C.
Lead and Tin
D.
Lead and Strontium

Solution:

QUESTION: 172

In angiosperms, endosperm is formed by

A.
Division of fused polar nuclei
B.
Division of fused polar nuclei and male gamete
C.
Free nuclear divisions of megaspore
D.
Division of fused synergids and male gamete

Solution: