AIIMS Full Mock Test 15


200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Full Mock Test 15


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This mock test of AIIMS Full Mock Test 15 for NEET helps you for every NEET entrance exam. This contains 200 Multiple Choice Questions for NEET AIIMS Full Mock Test 15 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Full Mock Test 15 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Full Mock Test 15 exercise for a better result in the exam. You can find other AIIMS Full Mock Test 15 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

The r.m.s. value of an a.c. of 50 Hz is 10A. The time taken by a.c. in reaching from zero to maximum value and the peak value of current will be

Solution:
QUESTION: 2

If we express the energy of a photon in KeV and the wavelength in angstroms, then energy of a photon can be calculated from the relation

Solution:
QUESTION: 3

What will happen to de-Broglie's wavelength if the velocity of electron is increased ?

Solution:
QUESTION: 4

The magnitude of electric field in the annular region of a charged cylindrical capacitor

Solution:

 

QUESTION: 5

A student measures the terminal potential difference (V) of a cell (of emf E and internal resistance r) as a function of the current (I) flowing through it. The slope, and intercept, of the graph between V and I, then, respectively, equal:

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QUESTION: 6

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

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QUESTION: 7

Cathode rays consist of

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QUESTION: 8

A positron and a proton are accelerated by the same accelerating potential. Then the ratio of the associated wavelengths of positron and proton will be [M = mass of proton; m = mass of positron]

Solution:

Since both proton and positron have the same charge

QUESTION: 9

The unit of inductance is equivalent to

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QUESTION: 10

In Millikan's experiment, an oil drop having charge q gets stationary on applying a potential differnce V in between two plates separated by a distance 'd'. The weight of the drop is

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QUESTION: 11

The working of a dynamo is based on principle of

Solution:
QUESTION: 12

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

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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

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QUESTION: 14

The pressure exerted by an electromegnetic wave of intensity I on a non-reflecting surface is (where c = Velocity of light)

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QUESTION: 15

The energy stored in a capacitor is actually stored

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QUESTION: 16

A fully charged capacitor has a capacitance (C). It is discharged through a small coil of resistance wire embedded in thermally insulated block of specific heat capacity (s) and mass (m). If temperature of the block is raised by ΔT, the potential difference (V) across the capacitor is

Solution:

QUESTION: 17

If g is the acceleration due to gravity on the earth's surface, the gain in the potential energy of an object of mass m raised from the surface of earth to a height equal to the radius of the earth R, is

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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

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QUESTION: 19

A black body is heated from 27ºC to 927ºC. The ratio of energies radiated will be

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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?

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QUESTION: 21

If a substance is to be paramagnetic, its atoms must have a

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QUESTION: 22

Consider the following statements Assertion (A) : A rocket moves forward by pushing the surrounding air backwards. Reason (R) : It derives the necessary thrust to move forward, according to Newton's third law of motion. Of these statements

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QUESTION: 23

The magnetic susceptibility does not depend upon the temperature in

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QUESTION: 24

Which of the following affets the elasticity of a substance?

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QUESTION: 25

Which of the following are the end products of uranium and actinium series?

Solution:
QUESTION: 26

Displacement between maximum potential energy position and maximum kinetic energy position for a particle executing simple harmonic motion 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): Corpuscular theory fails in explaining the velocities of light in air and water.
Reason (R): According to corpuscular theory light should travel faster in denser media than in rarer media.

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): Due to opposition offered by self-inductance, work is done by external agent in establishing current in circuit. This work done is stored as potential energy.
Reason(R): Self-inductance of a coil depends on the geometry of coils and medium.

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): In series LCR circuit, the resonance is equal and opposite to the capacitive reactance.
Reason (R): At resonance the inductive reactance is equal and opposite to the capacitive reactance.

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):If an object is at rest or in uniform linear motion on earth then it means that there are no forces acting on it.
Reason(R):Every body continues to be in its state of rest or of uniform motion in a straight line unless compelled by some external force to act otherwise.

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): Soft iron core is placed within the moving coild galvanometer .
Reason(R): Soft iron has low permeability .

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 current carrying conductor of any arbitrary shape in uniform magnetic field experiences a force given by where l' is the length vector joining initial to final points.
Reason(R): Force on a current carrying conductor is given by where for a conductor ∫ d l → represents vector sum of all the length elements from initial to final points.

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): We cannot think of a magnetic configuration with three poles.
Reason(R): A bar magnet does exert a torque on itself due to its own field.

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): There are 9 base units in SI
Reason (R) : Radian and steradian are base units

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): Photoelectric effect demonstrate the wave nature of light.
Reason(R): The number of photoelectrons is proportional to frequency of light.

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): Moving charge particle traces a helical path in a uniform magnetic field provided axis of the helix is perpendicular to magnetic field.
Reason(R): If a moving charges particle enters perpendicularly into a region of magnetic field from outside, it does not complete circular path.

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): Time period of a hollow ball will be more than that of a solid ball of same radius.
Reason(R): Time period is independent of mass or distribution but on l , where l is the distance between the point of suspension and the centre of the bob.

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): Hollow prism forms no spectra as a solid equilateral prism of glass.
Reason(R): Neglecting the thickness of the hollow glass surface, the media is same. So dispersion is not to take place.

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): A dimensionless quantity may have unit
Reason (R) : All unitless quantities are dimensionless

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 uniform circular motion angle between velocity vector and acceleration vector is always π 2 .
Reason(R): For any type of motion, angle between acceleration and velocity is always π 2 .

Solution:
QUESTION: 41

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A capacitor and a resistor are connected in series with an a.c. circuit. In this circuit current and potential difference across the resistance leads potential difference across the capacitor by and angle π/2.
Reason(R): In C-R circuit voltage lags behind the current by phase angle which depends on the value of C and R.

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):Forces of action and reaction do not cancel each other. Each produces its own effects.
Reason(R):Forces of action and reaction are equal and opposite.

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): Electrical resistivity of typical insulator (≃ 1014Ω-m) is about 1022 times that of metal (≃ 10-8Ω-m) while in case of heat it is only about 103 (as KAg ≃ 400 W/mk while Kglass ≃ 1 W/mk)
Reason(R): In electrical conduction only free electrons take part while in thermal conduction both lattice and free electrons contribute.

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): A hypermetropic person needs no lens for driving a vehicle.
Reason(R): Focal length of the eye lens of the hypermetropic person decreases.

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): When a magnet is brought near iron-nails, the nails are sticking to it, translate and also rotate.
Reason(R): The field of a magnet in general, is non-uniform.

Solution:
QUESTION: 46

A motor boat is travelling with a speed of 3.0 m/sec. If the force on it due to a water flow is 500 N, the power of the boat is

Solution:
QUESTION: 47

If at a height of 40 cm, the direction of motion of a projectile makes an angle π/4 with the horizontal, then its initial velocity and angle of projection are. respectively

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QUESTION: 48

Single from a remote control to the device operated by it travels with the speed of

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QUESTION: 49

The refracting angle of a prism is A and the refractive index of the material of the prism is cot A /2 . The angle of minimum deviation of the prism is

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QUESTION: 50

60º prism has μ = . Angle of incidence for minimum deviation is

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QUESTION: 51

In the depletion region of an unbiased P-N junction diode there are

Solution:
QUESTION: 52

On increasing the reverse bias to a large value in a P-N junction diode current

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QUESTION: 53

Two voltmeters, one of copper and the other of silver, are joined in parallel. When a total charge q flows through the voltmeters, equal amount of metals are deposited on their respective cathodes. If the electrochemical equivalents of copper and silver are z1 and z2 respectively, then charge which flows through the silver voltmeter is

Solution:

 

QUESTION: 54

The Vander waal's equation for a gas is where P,V,R,T and n represent the pressure, volume, universal gas constant, absolute temperature and number of moles of a gas respectively. a and b are constants. The ratio b a will have the following dimensional formula

Solution:
QUESTION: 55

The energy density and pressure have

Solution:
QUESTION: 56

X-rays are diffracted from a crystal of lattice plane spacing 2 Å . The maximum wavelength that can be diffracted is

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QUESTION: 57

Which of the following phenomena establish the wave nature of light?

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QUESTION: 58

Doppler's effects in sound and light are

Solution:
QUESTION: 59

A body of mass m is moving in a circle of radius r with a constant speed v. The force on the body is mv 2 / r and is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle

Solution:

Work done by the centripetal force is zero

QUESTION: 60

The order of activity of the various o- and p-director is

Solution:
QUESTION: 61

Which of the following is not isostructural with SiCl4?

Solution: Sicl4 has tetrahedral structure but scl4 has one lone pair plus 4 sigma bond so it is trigonal bipyramidal.
QUESTION: 62

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 forms [AIF6]3- but B does not form [BF6]3-.
Reason(R): B does not react with F2.

Solution:
QUESTION: 63

A white salt is readily soluble in water and gives a colourless solutions with a pH of about 9.The salt would be

Solution:
QUESTION: 64

There is no DNA in

Solution:
QUESTION: 65

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 uniform solid cylinder rolling with angular velocity ω along a plane surface strikes a vertical rigid wall. Angular velocity of cylinder when it begins to roll up a wall is less than the initial Angular velocity (ω).
Reason(R): After striking the vertical wall angular velocity increases.

Solution:
QUESTION: 66

When wine is put in air, it becomes sour due to

Solution:
QUESTION: 67

The number of moles of oxygen in 1 L of air containing 21% oxygen by volume, in standard conditions, is

Solution:
QUESTION: 68

Delocalized electrons are present in the molecules of

Solution: Benzene has delocalised electron due to resonance.
QUESTION: 69

Which of the following has least mass?

Solution:
QUESTION: 70

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

Solution:
QUESTION: 71

which of the following shows electrical conduction?

Solution:
QUESTION: 72

In graphite, the electrons are

Solution:
QUESTION: 73

If 75% of first order reaction is completed in 32 min, then 50% of the reaction would be completed in

Solution:
QUESTION: 74

If a gas at constant temperature and pressure expands, then its

Solution:
QUESTION: 75

When we increase the temperature, the rate of reaction increases because of

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): Atomic radii decrease left to right in a period.
Reason (R): When the electrons are added to the same shell, they are poorshielders, hence effective nuclear charge decreases.

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):Tungsten filament is used in electric bulbs.
Reason(R): Tungsten is metal of high melting point.

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

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): Equanil is a tranquiliser.
Reason(R): Equanil is used to cure depression and hypertension.

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): Sodium lauryl sacrosinate(SLS)is a catinoic detergent.
Reason(R): It is used in tooth paste, shampoos and water emulsion paints.

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): One volume of N2 combines with three volumes of H2 to form two volumes of NH3.
Reason(R): When two elements A and B combine to form more than one compounds then the weight of A which combines with a fixed weight of B are in proportions of whole numbers.

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): Anion vacancies in alkali halides are produced by heating the alkali halide crystals with alkali metal vapour.
Reason(R): Electrons trapped in anion vacancies are referred to as F-centres.

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):Beryllium halides dissolve in organic solvents.
Reason(R):Beryllium halides are ionic in character.

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): -COOR group activates substitution in benzene.
Reason(R): Meta directing groups are electron acceptors.

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):CH₄ and CO₂ have values of Z (compressibility factor) less than one.
Reason(R):Z<1 when the repulsive forces among the molecules are considerable.

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): Mass and volume are extensive properties.
Reason(R): Mass/volume is also extensive parameter.

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): Hydrogen has only one elctron in its orbit but it produces several spectral lines.
Reason(R): There are many excited energy levels available.

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): PCl5 exists but NCl5 does not .
Reason(R): Nitrogen cannot extend its covalence beyond three due to non-availability of 2d-subshell.

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): All monosaccharides are sweet.
Reason(R):All monosaccharides have the general formula C6H12O6.

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): Equivalent weight of an acid is equal to its molecular mass divided by acidity of acid.
Reason(R): Acidity is number of ionisable hydrogens that an acid contains.

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):The mobility of sodium ion is lower than that of potassium ion.
Reason(R):The ionic mobilities depend upon the effective radius of the ion.

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):Li is strongest reducing agent among alkali metals.
Reason(R):Li has highest hydration energy among alkali metals.

Solution:
QUESTION: 93

Under which of the following conditions ,the real gases will approach the behaviour of ideal gas ?

Solution:
QUESTION: 94

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

Solution:
QUESTION: 95

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): NF3 is a weaker ligand than N(CH3)3
Reason(R): NF3 ionises to F- ions in aqueous solution

Solution:
QUESTION: 96

The standard oxidation no. of the most electronegative element in the products of the reaction BaO2 and dil. H2SO4 is-

Solution:

Reaction between BaO2 and H2SO4 is
BaO2 + H2SO4 → BaSO4 + H2O2
The most electron negative element in products is oxygen
Oxidation no. of O in BaSO4 and H2O2 is -2 and -1 respectively

QUESTION: 97

In electrorefining of copper a mirror percentage of gold accumulates in

Solution:
QUESTION: 98

Which of the following ion forms a hydroxide highly soluble in water?

Solution:
QUESTION: 99

Which of the following is most volatile?

Solution:
QUESTION: 100

Sodium sulphate is soluble in water but barium sulphate is insoluble because

Solution:
QUESTION: 101

The alkali metals

Solution:
QUESTION: 102

In Solvay ammonia process, sodium bicarbonate is precipitated due to

Solution:
QUESTION: 103

The effective compound of bleaching powder is

Solution:
QUESTION: 104

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: 105

According to Lewis concept acid is

Solution:
QUESTION: 106

Neutralization of an acid with a base, invariably results in the production of

Solution:
QUESTION: 107

Which one of the following can be considered as weak electrolyte ?

Solution:
QUESTION: 108

Which is not true about acetophenone?

Solution:
QUESTION: 109

In the following, electrophile is:
HO ― NO2

Solution:
QUESTION: 110

Which does not contain conjugate system?

Solution:

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

QUESTION: 111

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

Solution:
QUESTION: 112

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

Solution:
QUESTION: 113

Ultra-silicon is prepared by the process of

Solution:
QUESTION: 114

Which is not the resonance structure of aniline?

Solution:
QUESTION: 115

Which of the following crystals does not exhibit Frenkel defect?

Solution:
QUESTION: 116

What weight of ferrous ammonium sulphate to prepare 100 ml 0.1 normal solution ? (mol.wt.392)

Solution:
QUESTION: 117

The amount of KMnO4 required to prepare 100 ml of 0.1 N solution in alkaline medium is

Solution:

w = 0.1 X 100 X 158 /1000 = 1.58 g
[as EKMnO4 (alkaline medium) = 158]

QUESTION: 118

Which out of the following is chiral in nature?

Solution:
QUESTION: 119

5.85 of NaCl is dissolved in H₂O and solution made upto 500 ml. The molarity is

Solution:
QUESTION: 120

0.078 gram of hydrocarbon occupy 22.4 ml volume at STP. The empirical formula of the hydrocarbon is CH. The molecular formula of the hydrocarbon is

Solution:
QUESTION: 121

An important ore of copper is

Solution:
QUESTION: 122

How many of these diseases,viz,Trachoma, Pneumonia, Dengue, Chlolera, Malaria, Yellow fever and Elephantiasis, are transmitted by mosquitoes?

Solution:
QUESTION: 123

What is true about birds:

Solution:
QUESTION: 124

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): The main function of suspensor is to provide nutrition to embryo.
Reason (R): It is attached to embryo by hypophysis.

Solution:
QUESTION: 125

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Primary succession taking a very long time.
Reason (R): Succession taking place after forest fire is called primary succession.

Solution:
QUESTION: 126

Nerve cells originated from embryonic

Solution:
QUESTION: 127

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Cholorophyll a absorbs 703 nm, 683 nm and 673 nm.
Reason (R): PS I stops if chlorophyll a absorbs only 683 nm wavelength of light.

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): The globular embryo is considered as proembryo.
Reason (R): The plumule, radical and cotyledons start differentiation during heart stage of embryo.

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): The collenchyma is thick walled living tissue.
Reason(R): The collenchyma is thickened due to the deposition of pectin.

Solution:

Collenchyma is a specialized type of parenchyma which is a supporting tissue. The cell walls are irregulary thickened due to the deposition of cellulose and pectin.

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): Phytoplankton is the pioneer stage of hydrosere.
Reason (R): Zooplankton appears after phytoplankton.

Solution:
QUESTION: 131

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): Presence of pneumatophores (the respiratory roots) is a special adaptation of hydrophytes.
Reason (R): Pnematophores help to take up oxygen from the atmosphere and transport it to the main roots.

Solution:
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): Dolomite can treat magnesium deficient areas.
Reason (R): A great amount of soil magnesium is unavailable to plants.

Solution:
QUESTION: 133

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Biotic potential is realised only when the environmental conditions are limiting.
Reason (R): Under such conditions only, the population size can increase at the maximum rate.

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): 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: 135

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 are formed by Golgi complex.
Reason (R): Golgi complex forms plasmalemma and cell wall.

Solution:
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): In hemianatropous ovule, the funicle lies parallel to body of ovule.
Reason (R): Here, body of ovule has rotated by 90º

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): Mitochondria and chloroplasts are semiautonomous organelles.
Reason(R): They are formed by division of pre-existing organelles as well as contain DNA but lack protein synthesizing machinery.

Solution:

Both mitochondria and chloroplasts are double membrane bound, semiautonomous cell organelles. Structure and functions of mitochondria and chloroplasts are partially controlled by nucleus of the cell and partially by themselves. Both of them possess their own DNA and arise from the pre existing cells. 70s type of ribosome is present in both organelles which can help to translate the coded information contained in mRNA and protein synthesis.

QUESTION: 138

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 sterile stamen is called staminode.
Reason (R): Flower having no essential floral parts are called neuter.

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): Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the roots of all cereal and pulse crops.
Reason(R): A gene incorporated in the bacterial chromosomal genome gets automatically transferred to the crop with which the bacterium is associated.

Solution:

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

QUESTION: 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): Inflammation of a skeletal joint may immobilize movements of the joint.
Reason(R): Uric acid crystals in the joint cavity and ossification of articular cartilage lead to this.

Solution:

Inflammation is a process in which the body's WBCs and the chemicals are released into the blood or the affected tissue to protect us from infection and foreign substances such as bacteria and viruses.This release of chemicals increases the blood flow to the area of injury or infection.Inflammation is characterized by redness, swollen joint that are warm to touch, joint pain, joint stiffness and loss of joint movement.
The increase in number of cells and inflammatory substances within the joint causes irritation, wearing down of cartilage and swelling of the joint lining. Inflammation of one or more joint results in arthritis. When there is a deposition of uric acid and crystals of sodium urates in the joints it will lead to gout arthritis.Gout affects one or two joints only. It is very painful particularly at night and makes movement difficult.Gout generally affects great toe.

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): Virus-free plants can be produced from virus infected plants by means of meristems tissue culture.
Reason(R): The virus fails to grow during the growth of host tissue in the artificial medium.

Solution:

Pathogen free clones of plants can be obtained through shoot-tip culture because shoot apical meristem is usually free of the pathogens.The shoot tips are virus free also and as shoot tips are grown in artificial medium, virus cannot grow there. Virus can grow in host cells only.

QUESTION: 142

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): The fungi are widespread in distribution and they even live on or inside other plants and animals.
Reason(R): Fungi are able to grow anywhere on land, water or on other organisms because they have a variety of pigments, including chlorophyll, carotenoids, fucoxanthin and phycoerythrin.

Solution:

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

QUESTION: 143

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 endodermal cells of dicot root form casparian strip.
Reason (R): Endodermis functions as a biological check post.

Solution:
QUESTION: 144

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): In cymose in inflorescence, the main axis shows continuous growth.
Reason (R): The arrangement of flower in this inflorescence is centrifugal.

Solution:
QUESTION: 145

Lactic acid fermentation does not produce

Solution:
QUESTION: 146

Polymer of α-D glucose is

Solution:
QUESTION: 147

Use the following information to answer the question.
1. Systole of the ventricles.
2. Opening of the atrio-ventricular valves.
3. Electricalimpulse sent from the SA node.
4. Atria fill with blood.
The order in which the events above occur during one heartbeat (the cardiac cycle) is

Solution:
QUESTION: 148

Which of the following supports the idea that the secretion of enzymes from the pancreas is controlled by hormones?

Solution:
QUESTION: 149

Recipients of Nobel Prize for Double helical are :

Solution:
QUESTION: 150

To which family does Carthamus tinctorious belong?

Solution:
QUESTION: 151

Flax fibers belong to

Solution:
QUESTION: 152

Tea and coffee can be classified as

Solution:
QUESTION: 153

Heat killed pathogenic NL cells and live nonpathogenic cells are mixed and injected into mice. The result would be

Solution:
QUESTION: 154

Which of the following is irrelevant in the evolution of man?

Solution:
QUESTION: 155

Heterosis requires :

Solution:
QUESTION: 156

Which of the following bacteria has found extensive use in genetic engineering work in plants ?

Solution:
QUESTION: 157

Cells involved in immune mechanism are

Solution:
QUESTION: 158

If an albino marries a normal woman and 50% offspring are albino, the woman is

Solution:
QUESTION: 159

Edward Jenner discovered

Solution:
QUESTION: 160

AZT is used in treatment of

Solution:
QUESTION: 161

Antibody formation and immunity production by globulin protein is found in

Solution:
QUESTION: 162

In the spadix, the spathe surrounds

Solution:
QUESTION: 163

Bacterial pili are involved in

Solution:
QUESTION: 164

Nostoc is

Solution:
QUESTION: 165

Hydroponics are

Solution:
QUESTION: 166

Which organelle would be required in large numbers by a cell whose membrane is often depolarized?

Solution:
QUESTION: 167

A photosynthetic organism which does not release oxygen is

Solution:
QUESTION: 168

Through which of the following does an electron pass to NADP+ in light reaction.

Solution:
QUESTION: 169

Which one yields Sunn Hemp

Solution:
QUESTION: 170

Alongwith auxin, another hormone is used in culture technique. It is