AIIMS Full Mock Test 14


200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Full Mock Test 14


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This mock test of AIIMS Full Mock Test 14 for NEET helps you for every NEET entrance exam. This contains 200 Multiple Choice Questions for NEET AIIMS Full Mock Test 14 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Full Mock Test 14 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Full Mock Test 14 exercise for a better result in the exam. You can find other AIIMS Full Mock Test 14 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

The plates of a capacitor are charged to a potential difference of 320 volts and are then connected across a resistor. The potential difference across the capacitor decays exponentially with time. After 1 second the potential difference between the plates of the capacitor is 240 volts, then after 2 and 3 seconds the potential difference between the plates will be

Solution:
QUESTION: 2

An electron remains undeflected when passing perpendicular to mutually perpendicular electric and magnetic fields. If the magnetic field is 8 Gauss and elecric field is 4000 V/m, the velocity of the electron is

Solution:
QUESTION: 3

An air capacitor of capacity C = 10 μ F is connected to a constant voltage battery of 12 volt. Now the space between the plates is filled with a liquid of dielectric constant 5. The charge that flows now from battery to the capacitor is

Solution:

C = 10 μ F
Charge in capacitor q = CV
= 10 x 12
= 120 μ C
On keeping liquid of dielectric constant5, capacity will becomes of 5 time.
∴ Charge q = 5 X 120
= 600 μ C

QUESTION: 4

When light of wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, however light of 600 nm wavelength is sufficient for creating photoemission. What is the ratio of the work functions of the two emitters

Solution:
QUESTION: 5

A galvanometer of resistance 20 Ω is to be converted into an ammeter of range 1 A. If a current of 1 mA produces full scale deflection, the shunt required for the purpose is

Solution:
QUESTION: 6

In an inelastic collision between two bodies, the physical quantity that is conserved

Solution:
QUESTION: 7

A transformer is employed to

Solution:
QUESTION: 8

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

Solution:
QUESTION: 9

In an A.C. circuit, the potential difference across an inductance and resistance joined in series are respectively 16 V and 20 V. The total potential difference across the circuit is

Solution:
QUESTION: 10

Compare electrons accelerated through a certain potential difference and protons accelerated through the same p.d. If initial velocities are negligible, then the emergent

Solution:
QUESTION: 11

Gases begin to conduct electricity at low pressure because

Solution:
QUESTION: 12

When a proton is accelerated with 1 volt potential difference, then its kinetic energy is

Solution:
QUESTION: 13

A coil of inductances 300mH and resistance 2 Ω is connected to a source of voltage 2V. The current reaches half of its steady state value in

Solution:


QUESTION: 14

Dimensions of 1/μ₀ ∈₀, where symbols have their usual meanings, are

Solution:
QUESTION: 15

Minimum no. of 8 μF and 250 V capacitors, used to make a combination of 16 μF and 1000 V, is

Solution:
QUESTION: 16

A 2 μF condenser is charged to 500V and then its plates are joined through of consistance. The heat produced in the resistance in joules is

Solution:
QUESTION: 17

There are four bodies having colours blue, red, black and white. When they are heated together and allowed to cool, which body will cool at the earliest?

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

Solution: Kinetic energy = p² ÷ 2m By given condition, p² ÷ 2m= constant so p1:p2=√m1:√m2
QUESTION: 19

A particle of mass m is moving in a horizontal circle of radius r under a centripetal force equal to - K/r2, where K is a constant. The total energy of the particle is

Solution:
QUESTION: 20

If two bulbs of wattage 25 and 30 W, each rated at 220 volts are connected in series with a 440 volt supply, which bulb will fuse?

Solution:
QUESTION: 21

A bar magnet of magnetic moment 3.0 A-m2 is placed in a uniform magnetic induction field of 2X 10–5 T. If each pole of the magnet experiences a force of 6 X 10–4 N, the length of the magnet is

Solution:

QUESTION: 22

When a magnetic needle is kept in a non-uniform magnetic field, it experiences :

Solution:
QUESTION: 23

A wire of length L and area of cross-section A is made of material of Young's modulus y. If the wire is stretched by the amount x, the work done is

Solution:
QUESTION: 24

A mass of 10 grams is suspended by a string and the entire thing is falling with a uniform acceleration of 400 cm/se2. The tension in the string will be (g=980 cm/sec2)

Solution:
QUESTION: 25

Which of the following is used as moderator?

Solution:
QUESTION: 26

A particle of mass 10 gm is decribing simple harmonic motion along a straight line with period of 2 sec and amplitude of 10 cm. Its kinetic energy when it is at 5 cm from its equilibrium position is

Solution:
QUESTION: 27

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A charged particle moving in a uniform magnetic field penetrates a layer of lead and loses half of its kinetic energy. The radius of curvature of its path is now reduced to half of its initial value.
Reason(R): Kinetic energy is proportional to square of radius of curvature.

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 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.

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): Frequency of note emitted by an organ pipe will decrease with rise in temperature.
Reason(R): Frequency =

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): The electron passing through crossed magnetic and electric field is always deflected from its path.
Reason(R): If velocity of electrons is equal to the ratio of electric and magnetic field applied then electron beam may remain undeflected.

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): If speed of light were half of its present value then binding energy reduces to half is present value.
Reason(R): Binding Energy ∝ speed of light.

Solution:
QUESTION: 32

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A system cannot have mutual inductance without having self inductances.
Reason(R): If mutual inductance of a system is zero, its self inductances must be zero.

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 limits of a derived quantity in terms of base quantities is called dimensional formula and raised powers on the base quantities are called dimensions
Reason (R) : Dimensions does not depend on the units of quantity

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): In an electric field, an electron beam perpendicular to the field is deflected along a parabola and in a magnetic field, the electron path, perpendicular to the field, will be circular.
Reason(R): In electric field, force is perpendicular to path and along the field and in magnetic field, force is perpendicular to both, the magnetic field and path of beam.

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): Turbulence promotes mixing and increases the rate of transfer of energy, mass and momentum in a blender.
Reason(R): Turbulence dissipates associated kinetic energy.

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): A soft iron-core is used in a moving coil galvanometer to increase the strength of magnetic field.
Reason(R): From soft iron-core, more number of magnetic lines of force pass.

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): Faraday's laws are consequences of conservation of energy.
Reason(R): In a purely resistive AC circuit, the current lags behind the emf in phase.

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.

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): In a pressure cooker the water is brought to boil. the cooker is then removed from the stove. now on removing the lid of the pressure cooker, the water starts boiling again.
Reason(R): The impurities in water bring down its boiling point.

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): In a stationary wave except nodes all points of the medium vibrate .
Reason(R): Amplitude of vibration is zero at the nodes .

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): According to law of conservation of mechanical energy sum of kinetic energy and potential energy is always constant.
Reason(R): Mechanical energy is conserve.

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): Speed of sound in a perfectly rigid rod is zero .
Reason(R): Speed of transverse wave in a metallic substance = , Where η is modulus of rigidity, and d is density of the metal.

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): If ℇ0 and μ0 respectively the electric permittivity and magnetic permeability of free space , and E and υ the corresponding quantities in a medium then refreactive index,

Reason(R): Speed of light in free space

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): An electron moving antiparallel to the field experiences maximum force.
Reason(R): (symbols have their usual meaning).

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): Lorentz force does not perform any work on the charged particle.
Reason(R): Lorentz magnetic force

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): Magnetic flux is a vector quantity.
Reason(R): Value of magnetic flux can be positive, negative or zero.

Solution:
QUESTION: 47

If a force is applied on a body and it moves with a velocity ν, the power will be

Solution:
QUESTION: 48

Two bullets are fired simultaneously, horizontally and with different speeds from the same place. Which bullet will hit the ground first?

Solution:
QUESTION: 49

Rainbow is due to

Solution:
QUESTION: 50

In Ramsden's eye-piece, the distance from the eye lens at which the image due to objective of focal length f is formed is

Solution:
QUESTION: 51

When a mirror is rotated through an angle θ, the reflected ray from it turns through an angle of

Solution:
QUESTION: 52

p-type crystal of a p-n junction diode is connected to a positive terminal of battery and n-type crystal connected to negative terminal of battery

Solution:
QUESTION: 53

Semiconductor is damaged by the strong current due to

Solution:
QUESTION: 54

Two identical wires of resistance R are first connected in series and then in parallel. The amount of heat produced in both the conditions are in the ratio of

Solution:

 

QUESTION: 55

Given that v is speed, r is the radius and g is the acceleration due to gravity. Which of the following is dimensionless

Solution:
QUESTION: 56

The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimensions of

Solution:
QUESTION: 57

Both light and sound waves produce diffraction. It is more difficult to observe the diffraction with light waves because

Solution:
QUESTION: 58

The superposition principle applies to

Solution:
QUESTION: 59

Young's double slit experiment gives interference fringes of width 0.3mm. A thin glass plate made of material of refractive index 1.5 is kept in the path of light from one of the slits, then the fringe width becomes

Solution:
QUESTION: 60

A body of mass m kg is lifted by a man to a height of one meter in 30 sec. Another man lifts the same mass to the same height in 60 sec. The work done by them are in the ratio

Solution:
QUESTION: 61

In glycerin,

Solution:
QUESTION: 62

Which of the following behave both as a nucleophile and as an electrophile?

Solution:
QUESTION: 63

The number of significant figures in 40.00 is

Solution:
QUESTION: 64

Which of the following is formed when benzene is heated with concentrated sulphuric acid at 80ºC?

Solution:
QUESTION: 65

Gammexane is

Solution:
QUESTION: 66

The oxidation of toluene to benzaldehyde by chromyl chloride is called

Solution:
QUESTION: 67

Which of the following shows electrical conduction?

Solution:
QUESTION: 68

The compound used as refrigerant is

Solution:
QUESTION: 69

Out of the following pair of species which one is most likely to combine by co-ordinate bond?

Solution:
QUESTION: 70

A catalyst increases the rate of reaction by

Solution:
QUESTION: 71

For a first-order reaction, half life period is independent of

Solution:
QUESTION: 72

In the complete combustion of butanol (C4H9OH(l))

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): For the combustion reactions, the value of ∆H is always negative .
Reason(R): The combustion reactions are always endothermic.

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): First electron gain enthalpy can be exothermic or endothermic.
Reason(R): Electron gain enthalpy is the ability of atom to attract the shared pair of electon towards itself.

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): Nitroalkanes and alkyl nitrites exhibit functional isomerism.
Reason(R): Compounds having same molecular formula and different functional groups are called functional isomers.

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): Fluoride has the lowest and iodide has the highest boiling point.
Reason(R): Boiling points of haloalkanes increases with increasing atomic mass.

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): Al(OH)3 is amphoteric in nature.
Reason(R): Al-O and O-H bonds can be broken with equal ease in Al(OH)3.

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): It is not always convenient to use SHE as reference electrode so calomal or silver-silver chloride electrodes are used.
Reason(R): It is difficult to maintain unity concentration of H⁺ ions and 1 atm. pressure of H₂ gas uniformally. Also, SHE gets poisoned with small impurities.

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): Tertiary alcohols give turbidity immediately with Lucas reagent.
Reason(R): A mixture of conc. HI + anhydrous ZnCl2 is called Lucas reagent.

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): For compounds exhibiting Frenkel defec, the density remains unaltered.
Reason(R): Doping of group 14 element with suitable elelment of group 13 produces p-type of semiconductors.

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): In the primary batteries, the reaction occurs again and again.
Reason(R): Dry cell is an example of primary battery.

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): The order of a reaction may be negative.
Reason(R): In some cases, the rate of reaction decreases as the concentration of the reactant increases .

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 precipitation of second group cations is done in faintly acidic medium.
Reason(R): The presence of hydrogen ion is necessary to dissolve unwanted sulphides of higher groups.

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): The overall order of the reaction is the sum of the exponents of a 'l the reactants in the rate expression.
Reason(R): There are many higher order reactions.

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): Ether fire is difficult to extinguish with water.
Reason(R): Ether fire is extinguished using pyrene (CCl4) fire extinguishers.

Solution:
QUESTION: 86

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Mg gets oxidised when heated in O₂ atmosphere.
Reason(R): Mg has strong affinity for oxygen.

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): Glass belongs to the category of ionic solid.
Reason(R): Glass is supercooled liquid.

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): Acid catalysed dehydration of t-butanol is slower than n-butanol.
Reason(R): Dehydration involves formation of the protonated alcohol, ROH₂⁺.

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): Benzene diazonium chloride is ionic in nature.
Reason(R): Diazo group of benzene diazonium chloride can be easily replaced by H using H3PO2/Cu2+.

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): PbI4 is more stable than PbI2
Reason(R): Riodide stabilizes higher oxidation states

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): Glass and cement are man made silicates.
Reason(R): Glass is a speudo solid.

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): No heat engine has efficiency of 100%.
Reason(R): It is not possible to convert all the heat into work.

Solution:
QUESTION: 93

One Faraday of electricity is passed separtely through one litre of one molar aqueous solution of
i) AgNO3, ii) SnCl4 and iii) CuSO4
The number of moles of Ag, Sn and Cu deposited at cathode are respectively

Solution:
QUESTION: 94

At STP 1.12 litre of H2 is obtained on flowing a current for 965 seconds in a solution. The value of current is

Solution:

1.12 L at N.T.P. mol = 0.05 mol
1 mol of H2 is obtained by passing electricity = 2 x 96500 C
0.05 mol of H2 is obtained by electricity = 2 x 96500 x 0.05
Now if I is current strength,
I x 965 = 2 x 96500 x 0.05 or I = 10 amp 

QUESTION: 95

If pressure and temperature of 4 dm3 of carbon dioxide gas are doubled, then the volume of carbon dioxide gas would be

Solution:
QUESTION: 96

Potassium metal is commercially prepared by the reduction of molten KCl with a metallic sodium at 850ºC (1123 K). This method is based upon the following principle

Solution:
QUESTION: 97

Which of the following has the highest conductivity?

Solution: When nothing is mentioned then by default we consider aqueous medium and in aqueous medium smaller the ion more it is surrounded by water molecules due to high charge density and grow bulky and its mobility decreases so size of cs+ will be minimum hence mobility maximum.
QUESTION: 98

Which is manufactured by electrolysis of fused NaCl?

Solution:
QUESTION: 99

In the reaction 2Br- + X₂ → Br₂ + 2X-, X₂ is

Solution:
QUESTION: 100

Which of the following alkaline earth metal forms covalent compounds?

Solution:
QUESTION: 101

The pH of blood is

Solution:
QUESTION: 102

When CH₃COONa is added to aqueous CH₃COOH solution

Solution:
QUESTION: 103

If H⁺ ion conc. of a solution is increased by 10 times, its pH will

Solution:
QUESTION: 104

Hydrogen at room temperature contains

Solution:
QUESTION: 105

When ammonium chloride is added to ammonia solution , the pH of the resulting solution will be

Solution:
QUESTION: 106

The oxidation of which of the following will give ethyl methyl ketone?

Solution:
QUESTION: 107

Following step is :
CH3CH3+Cl →CH3CH2+HCl

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 ?

Solution:
QUESTION: 109

In the following, electrophile is:
HO ― NO2

Solution:
QUESTION: 110

Most stable alkene is :

Solution:
QUESTION: 111

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

Solution:
QUESTION: 112

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

Solution:
QUESTION: 113

Which of the following glass is used in making wind screen of automobiles?

Solution:
QUESTION: 114

Potassium crystallizes in a bcc lattice, hence the coordination number of potassium in potassium metal is

Solution:
QUESTION: 115

The experimental molecular weight of an electrolyte will always be less than its calculated value because the value of Vant Hoff factor 'i' is

Solution:
QUESTION: 116

The volume of 0.6 M NaOH required to neutralize 30 cm3 of 0.4 M HCI is

Solution:
QUESTION: 117

Azeotropic mixtures are

Solution:
QUESTION: 118

The number of optically active isomers of the compound C7H16 are:

Solution:
QUESTION: 119

[Co(NH3)SO4] Br and [Co(NH3)5Br]SO4 are a pair of............isomers.

Solution:
QUESTION: 120

The equivalent weight of an element is 4. Its chloride has a vapour density of 60. The valency of the element is

Solution:
QUESTION: 121

Excretory organs of Cockroach are

Solution:
QUESTION: 122

Antibodies are produced by

Solution:
QUESTION: 123

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Pollen wall is made up of two walls-the intine and the exine.
Reason (R): Both has depositions of sporopollenin .

Solution:
QUESTION: 124

What is the scientific name of national bird of India?

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): Axillary buds, in actively growing herbaceous plants generally remain dormant.
Reason(R): This is due to apical dominance which is under the influence of auxins.

Solution:

The axillary bud is a bud that develops in the axil of a leaf of a plant (synonymous with lateral bud).Apical dominance is the phenomenon whereby the main central stem of the plant is dominant over (i.e., grows more strongly than) other side stems; on a branch the main stem of the branch is further dominant over its own side branchlets.When the apical bud is removed the axillary buds sprout.

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): Living organisms are regarded as closed systems.
Reason(R): Energy of living organisms cannot be lost or gained from the environment.

Solution:

Living organisms are regarded as open system as they can loose or gain the mass oe eneregy from the surrounding environment. All living organisms restore their lost energy from the sunlight or indirectly from the food material.

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): Nitrogen fixing bacteria may be symbiotic or non-symbiotic.
Reason (R): Blue-green algae fix N 2 both in free state or in symbiotic state.

Solution:
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): Magnesium is important in protein synthesis.
Reason (R): Mg+ + helps in binding of ribosomal subunits.

Solution:
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): A forest community in which pine tress are dominant is called a pine forest.
Reason (R): Communities are generally named after their dominant species.

Solution:
QUESTION: 130

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): Smooth endoplasmic reticulum is also called a granular endoplasmic reticulum.
Reason (R): SER contains ribophorins.

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): Wounds heal slowly due to vitamin C deficiency:
Reason(R): Vitamin C is essential for collagen formation.

Solution:

Main function of Vitamin C is to speed up the healing of wounds . So deficiency of Vitamin C causes the slow healing of wounds. The best characterized function of Vitamin C is the synthesis of collagen connective tissue protein at the level of hydroylation of prolyl and lysyl residues of procollagen. Thus Vitamin C is important for tissue healing.

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): Samara is a winged achenial fruit.
Reason (R): Wings may or may not develop from its pericarp.

Solution:
QUESTION: 133

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): The regulation of RBC production is accompalished by the kidneys.
Reason(R): Erythropoietin hormone circulates to the red bone marrow, where it increases stem cell mitosis and speeds up the development of RBCs.

Solution:
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): Placenta bears ovules.
Reason (R): An ovary has one placenta.

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): Hearing aids help the hearing impaired to hear.
Reason(R): They make sound travel through skull bones.

Solution:

Hearing aids help the hearing impaired to hear. Hearing impairment means deafness. It can be classified as conductive loss of hearing which occurs when bones of the middle ear do not function properly and sensorineural deafness which results from long exposure to excessive noise levels. The function of hearing aid is to remove these difficulties by acting on those specific areas. Bone anchored aid system is surgically implanted and allows sound to be conducted through the bone rather than the middle ear. The system worls by enhancing natural bone transmission as a pathway for sound to travel to the inner ear. The vibrating implant stes up vibrations within the skull and inner ear that finally stimulate the nerve fibres of the inner ear allowing hearing.

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): The cuticle provides rigidity to the leaf.
Reason (R): Cuticle is formed of sclerenchyma tissue.

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): Coconut tree is distributed in coastal areas over a large part of the world.
Reason(R): Coconut fruit can float and get dispersed over thousands of kilometers before losing viability.

Solution:

Coconut tree is grown in coastal areas because it needs hot and wet climate. Coconut fruit show hydrochory i.e. the dispersal takes place through water medium. The coconut fruit is adopted the habitat of coastal areas, so the fruit can float and get dispersed over thousand of kelometers before losing viability.

QUESTION: 138

In the following questions, a statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the statements carefully and mark the answer-
Assertion (A): Lysosomes show stability in the living cell.
Reason (R): Lysosomal membrane is not digested by the lysosomal enzymes

Solution:
QUESTION: 139

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): C4-plants photosynthesize more efficiently than C3-plants.
Reason(R): C4-plants have a shorter carbon dioxide fixation cycle.

Solution:

The initial work of Kortschak, Hartt and Barr, which demonstrated that rapidly photosynthesizing sugarcane plants fix CO2 into aspartic and malic acids, was confirmed by Hatch and Slack. Hatch and Slack proposed this pathway as Hatch and Slack pathway and named such plant as C4 plants (as the products are four carbon compounds).
C4 plants possess two types of chloroplasts bundle sheath cells and mesophyll cells. The mesophyll cells of C4plants exhibit high activity of phosphoenolpyruvate (PEP) carboxylase, which catalyzes the fixation of CO2 with PEP to form oxaloacetic acid. The bundle sheath cells exhibit high RuBP carboxylase and the other enzymes of the Calvin – Benson cycle. C4 plants are highly productive photosynthetically in view of the low affinity of the RuBP carboxylase for its substrate. But CO2 is concentrated as C4acids due to the activity of the PEP carbgoxylase, which in effect maintains high pool levels of CO2 C4 plants are related to very high light – harvesting saturation points. C4 plants exibit low rates of photorespiration only in bundle sheath cells. C4 plants are adapted to high temperature. C4 plants show better utilization of available water.

QUESTION: 140

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): Senescence is the time when age associated defects are manifested.
Reason(R): Certain genes may be undergoing seqential switching on and off during one's life.

Solution:

Senescence is the process of aeging which is cumulative changes in an organism, organ, tissue, or cell leading to a decrease in functional capacity. In humans aeging is associated with degenerative changes in the skin, bones heart, blood vessels, lungs, nerves etc.The genetically controlled programme is regulated by regulatory genes.There is wide range of life spans among different animal species.Examples - A few days in the fruit fly to more than 100 years in tortoise.
Genes which have a deleterious effect on individual's fitness are selected.Mutations in these genes which postponed the deleterious effect of the gene to a later time in individuals's life history reduce the effect of natural selection to the gene because the selection has less time to act on it.If the gene does not have a negative effect until after the individual has reproduced the gene may escape the natural selection altogether because when selection starts to affect the gene it has already propagated to the next generation. In a related fashion some genes may also help to ensure reproduction at the cost of diseases later in life.

QUESTION: 141

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it. Read the Statement carefully and mark the correct answer-
Assertion(A): Marshes and swamps are wet lands.
Reason (R): Marshes and swamps are considered as fresh water ecosystems.

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

Solution:
QUESTION: 143

The highest blood pressure in the aorta occurs when the

Solution:
QUESTION: 144

Cellulose is

Solution:
QUESTION: 145

The electron transport chain, terminal oxidation of the cytochrome which donates electrons to H⁺ and also catalyses the addition of

Solution:
QUESTION: 146

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): Only the outer integument of ovule forms the seed coat.
Reason (R): The cotton fibres of commerce are formed by the outer integument.

Solution:
QUESTION: 147

The Kupffer cells are phagocytic cells found in the _____.

Solution:
QUESTION: 148

The length of one full turn of DNA is :

Solution:
QUESTION: 149

The drug Santonin is obtained from the flowers of

Solution:
QUESTION: 150

Tea and coffee can be classified as

Solution:
QUESTION: 151

Primate closest to humans in evolution are

Solution:
QUESTION: 152

One of the major "basmati" rice producing states in our country is

Solution:
QUESTION: 153

Pyrimidine base present in RNA in place of thymine of DNA is

Solution:
QUESTION: 154

The Ti plasmid is often used for making transgenic plants. This plasmid is found in

Solution:
QUESTION: 155

A cross between hybrid and its parent is

Solution:
QUESTION: 156

A person with antigen 'B' in RBC and antibodies 'a' in the plasma belongs to the blood group

Solution:
QUESTION: 157

Active immunity means

Solution:
QUESTION: 158

Huntington's chorea is characterised by

Solution:
QUESTION: 159

Type of immunoglobulin present in colostrum/mother's milk is

Solution:
QUESTION: 160

Which is not an immunological technique?

Solution:
QUESTION: 161

Bacterial resistance to antibiotic ampicillin cab be due to presence of

Solution:
QUESTION: 162

Which is not a correct match

Solution:
QUESTION: 163

Major role of minor elements inside living organisms is to act as

Solution:
QUESTION: 164

Pilli in bacteria represent

Solution:
QUESTION: 165

Who discovered purification of air in light by green plants

Solution:
QUESTION: 166

Which of the following is controlled by the somatic nervous system?

Solution:
QUESTION: 167

Which of the following is the false statement about 'antibiotics'?

Solution:
QUESTION: 168

Translocation of carbohydrate nutrients usually occurs in the form of

Solution:
QUESTION: 169

Photosynthates are transported through