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# AIIMS Full Mock Test 1

## 200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Full Mock Test 1

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

### 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:

A is the correct option.In electrical conduction only free electrons take part while in thermal conduction both lattice and free electrons contribute and this is the reason that leads to the phenomenon of 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).

QUESTION: 2

### 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 easier to start a car engine on a warm day than cold day. Reason(R): Internal energy of the engine is high on a warm day than a cold day .

Solution:

The correct option is Option C.
It is easier to start a car engine on a warm day than on a chilly day. With increase in temperature (i.e., on a warm day) the internal resistance of a car battery decreases. Due to it, the battery can supply large current which helps in starting the car engine easily.

QUESTION: 3

### 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): Pressure in a bubble (σ) in an atmosphere of pressure P0 is where r is the radius. Reason(R): is the excess pressure due to two surfaces exposed to the atmosphere.

Solution:

The correct answer is B as both the given assertion and reason are true but reason is not the correct explanation of given assertion.as The excess pressure across a soap bubble of radius r is p=r4σ, where σ is the surface tension of soap solution.

QUESTION: 4

Voltage in the secondary coil of a transformer does not depend upon.

Solution:
As, V1/V2 = N1/N2;
so. V2 = (V1 x N2)/N1
Hence we can conclude voltage in secondary coil i.e V2 is independent of Frequency of the source but depends on Voltage in the primary coil and Ratio of number of turns in the two coils.
QUESTION: 5

The closest distance of approach of an α - particle travelling with a velocity 'V' to a certain nucleus is 'x'. The distance of closest approach of α - particle travelling with a velocity 3V to the same nucleus is

Solution:
QUESTION: 6

A 10 μF capacitor and a 20 μF capacitor are connected in series across 200 V supply line. The charged capacitors are then disconnected from the line and reconnected with their positive plates together and negative plates together and no external voltage is applied. What is the potential difference across each capacitor?

Solution:

C1 = 10μF, C2 = 20μF
Fquivalent capacitance in series Charge on each capacitor
q = CV In seies charge in both capacitor is same.
∴ toal charge Now the capacitors are connected in parallel.
Equivalent capacitance in parallel. Potential QUESTION: 7

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

Solution: H/ 4mv2=h/ mv1; V1:V2= 4:1
QUESTION: 8

Two solid rubber balls A and B having masses 200 and 400 gm respectively are moving in opposite directions with velocity A equal to 0.3 m/s. After collision the two balls come to rest, then the velocity of B is

Solution: M1= 200gm or 0.2kg, v1= 0.3m/s m2=400gm or 0.4 kg v2=? m1v1=m2v2 because after collision two ball are stop so collision is elastic and it's not depends on mass(action reactions rule) and it's then possible when two ball moving in opposite direction 0.2×0.3=0.4×(-v2) 0.06/0.4=- v2 v2=-0.15 ans.
QUESTION: 9

You are given several identical resistances each of value R = 10 Ω and each capable of carrying maximum current of 1 ampere. It is required to make a suitable combination of these resistances to produce a resistance of 5Ω which can carry a current of 4 amperes. The minimum number of resistances of the type R that will be required for this job

Solution:
QUESTION: 10

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

Solution:
QUESTION: 11

An electron and a proton have the same de-Broglie wavelength. Then the kinetic energy of the electron is

Solution:
QUESTION: 12

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

Solution:
QUESTION: 13

The working of a dynamo is based on principle of

Solution:
QUESTION: 14

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

Solution:
QUESTION: 15

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: 16

Which of the following statement is true?

Solution: Velocity of light in vacuum is maximum is 3×10^8 and it's highest velocity.
QUESTION: 17

A straight wire of length l and electric dipole moment p is bent to from a semicircle. The new electric dipole moment would be

Solution: Initial dipole moment, P = q × Lwhen it is bent in the form of a semicircle,L = πRR = L/πNow the charges are present at diametrically opposite points of the semicircleDistance between the charges = 2R = 2L/πNew dipole moment, P' = q × 2R = q × (2L/π) = 2p/π.
QUESTION: 18

A cylinder of radius r and length a is placed in a uniform in a uniform electric field E parallel to the axis of the cylinder. The total electric flux over the curved surface of cylinder is

Solution:

The electric flux entering and leaving the cylindrical surface is same
Φ = EπR2 - EπR2 = 0
where, E = electric field
R = radius of cylinder
Φ = outward flux

QUESTION: 19

In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will be

Solution:   QUESTION: 20

The enegy stored in wound watch spring is

Solution:
QUESTION: 21

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

Solution: Yes option D is correct answer...solution..v^2=u^2-2as0=u^2-2asu^2 is directionally proportional to s(u1÷u2)^2=s1÷s2since;u1=30 and u2=60 and s1=8 and s2=?30×30/60×60=8/s21/4=8/s2so;s2=32m..
QUESTION: 22

The rate of transfer of heat is more in

Solution: Radiation is electromagnetic wave traveling at highest possible speed. Example is sun ray coming through space nd falling on earth. It takes 8.5min approx to cover the distance nd governed by radiation.
QUESTION: 23

Time taken by a 846 W heater to heat one litre of water from 10ºC to 40ºC is

Solution: Use Pt=Q=ms∆T where P: Power ,t:time,∆T: change in temperature,Q:heat ,m:mass846×t=Q=1×4200×(40-10)t≈150 seconds.
QUESTION: 24

Two similar bar magnets P and Q each of magnetic moment M are taken. If P is cut along its axial line and Q is cut along its equatorial line, all the four pieces obtained have each of

Solution:
QUESTION: 25

A bar magnet, of magnetic moment M, is placed in a magnetic field of induction B. The torque exerted on it is

Solution:
QUESTION: 26

Two wires of the same material and length, but diameters in the ratio 1 : 2 are stretched by the same force. The elastic potential energy stored per unit volume for the two wires when stretched, will be in the ratio of

Solution: QUESTION: 27

The ratio of the weight of a man in a stationary lift and when it is moving downward with uniform acceleration 'a' is 3:2. The value of 'a' is (g-Acceleration due to gravity of the earth)

Solution:
QUESTION: 28

Half life of a radioactive substance which disintegrates by 75% in 60 minutes will be

Solution: Yes option B is correct answer....because 75 percentage of the substance is disintegrate by 2 half lives..2half lives=60÷t1t1=60÷2=30therefore: t=30 minutes...
QUESTION: 29

If a spring is extended to length l, then according to Hooke's law

Solution: The Correct option is A. Hooke's law states that the force(F) needed to extend or compress a spring by some distance l sacked linearly with respect to that distant. That is F= kl. Here the -ve sign indicates the spring restoring force is opposite to the stretch direction.
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): We use a thick wire in the secondary of a step down transformer to reduce the production of heat.
Reason(R): When the plane of the armature is parallel to the line of force of magnetic field, the magnitude of the induced emf is maximum.

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): Efficiency of an engine with sink temperature of zero Kelvin is 100%.
Reason(R): Keeping the sink at ice point with the source at 100oC will bring 100% efficiency.

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): Potential energy is defined for only conservative forces.
Reason(R): 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): Energy output in a fusion reaction is very much less than energy released in the fission process.
Reason(R): Fusion is a weaker energy-source than fission.

Solution:

The energy output in a fusion reaction (21.6 MeV) is very much less than the energy released in the fission of a U235 nucleus (190 MeV). But this does not mean that fusion is a weaker energy source than fission. The number of hydrogen nuclei in 1 gram of heavy hydrogen is much larger than the number of U235 nuclei in 1 gram of uranium. Therefore, the energy obtained by the fusion of a certain mass of heavy hydrogen is much larger than tje energy obtained by the fission of equal mass of uranium

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): The magnetic field at the ends of a very long current carrying solenoid is half of that at the centre.
Reason(R): If the solenoid is sufficiently long, the field within it is uniform.

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): At the same temperature, the speed of sound in oxygen is one-fourth the speed of sound in hydrogen.
Reason(R): Molecular weight of oxygen is more than the molecular weight of hydrogen .

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): X-rays and γ-rays are similar in many aspects.
Reason(R): X-rays and γ-rays have the same sources of origin.

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): A charged particle moves perpendicular to magnetic field. Its kinetic energy remains constant, but momentum changes.
Reason(R): Force acts perpendicular to velocity of the particle.

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): 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.

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): The amplitude of an oscillating pendulum decreases with time.
Reason(R): The frequency also decreases with time.

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): Study of Fraunhofer lines in the spectrum of sun led to the discovery of hydrogen.
Reason(R): Fraunhofer lines are dark lines in the continuous solar spectrum.

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): Refractive index of a material depends on the frequency of the light
Reason(R): Incoming e.m. wave applies an electric field and polarises it, contributing to (∈) permittivity of the medium, depending on its frequency.

Solution:
QUESTION: 42

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The maximum frequency of the photon produced by the union of a positron and an electron is 1.2 x1020Hertz.
Reason(R): In electron-positron collision, both are annihilated and the total mass is converted into γ-photon(energy).

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): Electron capture occurs more often than positron emission in heavy elements.
Reason(R): Heavy elements exhibit radioactivity.

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): Frictional forces are conservative.
Reason(R): Potential energy can be associated with frictional forces.

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): The SI unit of magnetic field is also known as Tesla
Reason(R): 1T = 1NA-1m-1

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): 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.

Solution:
QUESTION: 47

An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplied by the motor is

Solution: Power=work÷ time =40×30÷60seconds =20W
QUESTION: 48

If the horizontal range of a projectile is equal to the maximum height reached, then the corresponding angle of projection is

Solution:

Horizontal range = maximum height reached QUESTION: 49

The maximum energy received by the earth from the sun is in the form of

Solution: According to plancks equation E=hv, x rays have high frequency compared to others.
QUESTION: 50

The refracting angle of a prism A is small. The correct statement for the dispersive power of a prism is that dispersive power

Solution:
QUESTION: 51

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

Solution:
QUESTION: 52

The valency of an impurity added to germanium crystal in order to convert it into a P-type semi-conductor is

Solution:
QUESTION: 53

Zener breakdown in a semi-conductor diode occurs when

Solution: Its only used in reverse bias only and when the exceeds its maximum value the graph of reverse bias goes straight means current suddenly increases to a large value so than only zener breakdown occurs.
QUESTION: 54

Which of the following does not make use of chemical effect of current?

Solution: Thermoelectric refrigerator based on the physical effect of current that when current flows to one side it also carries heat with it making the other side cooler.
QUESTION: 55

The dimensions of Planck's constant and angular momentum are respectively

Solution:
QUESTION: 56

The unit of acceleration is a

Solution:
QUESTION: 57

In Huygen's wave theory, the locus of all points oscillating in the same phase is called a

Solution:
QUESTION: 58

A wave front travels

Solution:
QUESTION: 59

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

Solution:
QUESTION: 60

It is easier to draw up a wooden block along a inclined plane than to haul it vertically, principally because

Solution:
QUESTION: 61

Glycerol on heating with potassium bisulphate yields

Solution:
QUESTION: 62

The maximum amount of BaCl₄ precipitated on mixing BaCl₂ (0.5 M) with H₂SO₄ (1M) will correspond to

Solution:
1. In question it should ask to calculate amount BaSO4 in terms of moles.

2. The reaction is :

BaCl2 + H2SO4 →→ BaSO4 + 2HCl

3. 1 mole of BaCl2 reacts with 1 mole of H2SO4 to give 1 mole of BaSO4.

But here 0.5 M of BaCl2 is present for 1 mole of H2SO4.

So, BaCl2 is the limiting reagent,and 0.5M of BaSO4 is obtained.

QUESTION: 63

An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular formula of compound is

Solution: Vapour density=73 ...therefore mol.mass=VD×2=146. there is only one optn with m.mass 146 .. option B is corrrect.
QUESTION: 64

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

Solution:
QUESTION: 65

Which of the following possesses the highest melting point?

Solution:
QUESTION: 66

The size of C ― C bond in benzene, is

Solution:
QUESTION: 67

Water gas is a mixture of

Solution:
QUESTION: 68

In graphite, the electrons are

Solution:
QUESTION: 69

Which of the following species is paramagnetic?

Solution:
QUESTION: 70

A first order reaction is 50% complete in 10 minutes. The rate constant of the reaction is

Solution:
QUESTION: 71

Which of the following is true about catalyst?

Solution:
QUESTION: 72

Heat capacity is

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): 10 vol. H₂O₂ means that 1 mL of H₂O₂ solution at NTP gives 10 mL of O₂ gas.
Reason(R): H₂O₂ decomposes to give water and O₂.

Solution:
QUESTION: 74

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In Ch3CH2CH2Cl; + I inductive effect in present.
Reason(R): Chlorine is more electronegative than carbon.

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): Oxidation of amino-naphthalene yields phthalic acid.
Reason(R): An amino group attached to the benzene ring renders it sensitive to oxidation.

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): In an acid-base titration involving strong base and a weak acid. methyl orange can be used as an indicator.
Reason(R): Methyl orange changes its colour in the pH range 3 to 5.

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

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): Urease is an enzyme which catalyses the hydrolysis of urea.
Reason(R): All catalysts are enzymes.

Solution: Assertion is correct but reason is incorrect because all enzymes are catalyst but all catalyst are not enzyme it may be hormones or other chemicals..
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): KCl/NaCl/NH₄Cl etc. cannot be used in the salt bridge of a cell containing silver.
Reason(R): A salt bridge contains concentrated solution of an inert electrolyte like KCl, KNO₃, K₂SO₄ etc. or solidified solution of such an electrolyte in agar-agar and gelatine.

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): Power alcohol is a mixture of petrol, benzene and alcohol.
Reason(R): Alcohol supports burning of petrol.

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): Absorption spectrum consists of some bright lines separated by dark lines.
Reason(R): Emission spectrum consists of dark lines.

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): Aqueous solution of Na₂CO₃ is alkaline in nature.
Reason(R): When dissolved in water, Na₂CO₃ undergoes anionic hydrolysis to form strong base and weak acid.

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): H⁺ ion has a very high polarising power.
Reason(R): Size of H⁺ ion is very small.

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): Potash alum is used in purification of water.
Reason(R): Potash alum is able to precipitate colloidal particles present in dirty water.

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): 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: 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): Melting point of calcium halides decreases in the order CaI₂>CaBr₂>CaCl₂.
Reason(R): Smaller ions have lesser polarisability and thus their compounds are more ionic.

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): Water is not known to react with metal salts.
Reason(R): Water occupies the interstitial sites in the crystal lattice of some compounds.

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): Non-metals oxidation state of metal
Reason(R): Oxidation state of metal becomes positive as it is oxidised and non-metal becomes negative asitis reduced.

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): Li resembles Mg.
Reason(R): Li⁺ has almost same size as Mg2⁺.

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): White phosphorus is less stable than red phosphorus.
Reason(R): White phosphorus exists as P4 molecules.

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): [Al(NH3)6]3+ does not exist in aqueous solution.
Reason(R): NH3 is a neutral ligand.

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): Fluoroacetic acid is a stronger acid than chloroacetic acid.
Reason(R): Carboxylic acids are waeak acids and turn blue litmus red .

Solution:
QUESTION: 93

For measuring the conductivity of an electrolyte its solution should be prepared in

Solution:
QUESTION: 94

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

Solution:
QUESTION: 95

At what temperature, the volume of a gas at 0ºC will become double, when pressure remains constant?

Solution:
QUESTION: 96

Which of the following compounds is used in gun powder?

Solution:
QUESTION: 97

The equivalent conductance of NaCl, HCl and C₂H₅COONa at infinite dilution are 126.45, 426.16 and 91 ohm⁻1 cm2 respectively. The eq. conductance of C₂H₅COOH is

Solution:
QUESTION: 98

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?

Solution:
QUESTION: 99

Which of the following alkali metal ions has lowest ionic mobility in aqueous solution?

Solution:
QUESTION: 100

Chlorine acts as a bleaching agent only in the presence of

Solution:
QUESTION: 101

What happens when few drops of H₂SO₄ are added to water?

Solution: H2SO4 is acid so H+ Ion conc. increase and OH- ion conc. decrease..
QUESTION: 102

The process used for the removal of hardness of water is

Solution:
QUESTION: 103

If one drop of methyl orange is added in a solution, the solution becomes pink. The solution is

Solution:
QUESTION: 104

Identify the indicator used to titrate Na₂CO₃ solution with HCl

Solution:
QUESTION: 105

Which of the following reagents is used to distinguish acetone and acetophenone?

Solution:
QUESTION: 106

Hydrogen ion concentration of 0.2 M CH₃COOH, which is 40% dissociated, is

Solution:
QUESTION: 107

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

Solution: AlCl3 is a electron deficient it's octate is incomplete so it will accept electron and act as L.acid
QUESTION: 108

Benzophenone can be converted into benzene using

Solution:
QUESTION: 109

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

Solution:
QUESTION: 110

Conc.HNO3 forms in presence of:

Solution:
QUESTION: 111

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: 112

Piezoelectric crystals are used in

Solution:
QUESTION: 113

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

Solution:
QUESTION: 114

Quartz is a crystalline variety of

Solution:
QUESTION: 115

At room temperature, the mole fraction of a solute is 0.25 and the vapour pressure of a solvent is 0.80 atm. Then the lowering of vapour pressure is

Solution:
QUESTION: 116

The process of osmosis was first discovered by

Solution:
QUESTION: 117

The volume of 0.1 M H₂SO₄ solution required to neutralise 50 ml of 0.2 M NaOH solution is

Solution:
QUESTION: 118

7 grams of CO on complete oxidation produce the following weight of CO2

Solution:
QUESTION: 119

Which of the following properties are not correct for enantiomers?

Solution:
QUESTION: 120

The valence shell of transition elements consist of

Solution:
QUESTION: 121

The outermost shealth of connective tissues, that surrounds a skeletal muscle, is

Solution: These and other connective tissues associated with muscles follow: The endomysium is the connective tissue that surrounds each muscle fiber (cell). The perimysium encircles a group of muscle fibers, forming a fascicle. The epimysium encircles all the fascicles to form a complete muscle.
QUESTION: 122

The skull of birds is

Solution:
QUESTION: 123

Trilobites evolved during

Solution: Trilobites meaning "three lobes") are a fossil group of extinct marine arachnomorph arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period (521 million years ago), and they flourished throughout the lower Paleozoic era before beginning a drawn-out decline to extinction when, during the Devonian, all trilobite orders except the Proetids died out. Trilobites disappeared in the mass extinction at the end of the Permian about 252 million years ago. The trilobites were among the most successful of all early animals, roaming the oceans for over 270 million years.
QUESTION: 124

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 final reabsorption of water from urine into blood occurs through the collecting duct of a mammalian nephron, resuliting in the production of hyperosmotic urine.
Reason(R): The loop of Henle is responsible for the formation of a sodium gradient across the depth of the cortical interstitium of a mammalian kidney.

Solution:

The effect of collecting duct depends on the prescence of vasopressin. This hormone increases the permeability of the collecting duct to water. Gradually the rate of reabsorption from the filterate increases and it becomes hyperosmotic.
Loop of Henle is a U-shaped tubular part which lies in the renal medulla, which has a thin walled permeable descending limb and thick walled impermeable ascending limb.Na+, K+ and Cl- are transported out of thick segement of ascending limb.

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): Ants generally disperse the fruits and seeds having oil bodies.
Reason (R): They feed on the oily substances.

Solution:
QUESTION: 126

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Cordate and obcordate both are heart-shaped leaves.
Reason (R): Cordate and obcordate are synonymous.

Solution:
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): Meiotic division results in the production of four dissimilar cells.
Reason(R): Synapsis occurs during zygotene of meiosis.

Solution:

Mitosis give rise to two daughter cells, which are identical to each other as well as to the parent cell.While, Meiosis is a double division which occurs in a diploid cell (or nucleus) and gives rise to four haploid cells (or nuclei), each having half the number of chromosomes as compared to the parent cell.Meiosis give rise to four daughter cells. These four cells, though resemble each other with respect to chromosome number, they differ, since paternal and maternal chromosomes would reassort during first division and these would give rise to new types due to exchange of chromosome segments. Synapsis occurs during zygotene of meiosis. The two homologous chromosomes get attached to each other, and the process of attachment is known as synapsis. It produces a complex known as synaptinemal complex. 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): Primary cambium is a lateral meristem.
Reason (R): Cork cambium is the secondary meristem.

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): When the ambient temperature is high and soil contains excess of water, the plants tend to lose water in the form of droplets from lenticels.
Reason(R): Root pressure regulates the rate of loss of water form lenticels.

Solution:

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

QUESTION: 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): An embryo is formed from the fertilized egg.
Reason (R): An embryo always contains an embryonal axis with two cotyledons.

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): Cladodes are atems of unlimited growth.
Reason (R): Only the main stem is modified as cladodes.

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): Collenchyma is dead cell.
Reason (R): Walls of collenchyma cells are completely thickened.

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): Presently, the global atmosphere is warming up.
Reason(R): The depletion of stratospheric ozone layer has resulted in increase in ultraviolet radiations reaching the earth.

Solution:

The warming up of global atmosphere in the present day is ddue to the increase in green house effect.The greenhouse effect is the process by which absorption and emission of infrared radiation by gases in the atmosphere warm a planet's lower atmosphere and surface.
There is concern that increasing concentration of the green house gases including CO2, CH2 and man made chloroflurocarbons (CFCs), may enhance the green house effect and cause global warming. Ozone layer present in the stratosphere is depleted by the aerosols and chloroflurocarbonss.Ozone protects the earth from high energy ultra violet radiation.

QUESTION: 134

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): 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: 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): Many visitor to the hills suffer from skin and respiratory allergy problems.
Reason(R): Conifer trees produce a large quantity of wind-borne pollen grains.

Solution:

In hilly regions many trees like Oak, Elm, Hickory, Pecan and Cedar produce allergic pollen grains which cause allergy to people visiting the hills which results in the respiratory and skin problems.The symptoms of pollen allergy are- sneezing, itching eyes, nose and throat, dark circles under eyes caused by restricted blood flow near the sinuses, watering eyes and conjunctivitis.
Conifer trees produce a large quantity of wind borne pollen grains because many pollen grains are destroyed in the process of pollination done by wind.But these large number of pollen grains cause allergies.

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): Plant roots absorb water from soil colloids.
Reason (R): Hygroscopic water is held by soil colloids.

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): Watson and Crick provided experimental proof of semiconservative nature of DNA replication.
Reason(R): DNA polymerase binds nucleotides in replication.

Solution:

Watson and Crick suggested that replication of DNA is semiconservative.According to the semi Conservative mode each strand of the two double helices formed would have one old and one new strand.
While semiconservative nature of DNA replication was proved by Messelsn and Stahl by using heavy isotope of nitrogen (15N). DNA polymerase III establishes phosphodiester linkages between the adjacent deoxyribonucleodise phosphate in presence of ATP/GTP, TPP and Mg2+. It produces a new strand of DNA. DNA polymerase binds nucleotides in 5'-3' direction.

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): Inhabitants close to very busy airports are likely to experience health hazards.
Reason(R): Sound level of jet aeroplanes usually exceeds 160 dB.

Solution:

Inhabitants close to very busy airports are likely to experience health hazards. Because maximum acceptable range of sound is 80 to 90 dB. But in the places like airports this level is always exceeds thus it creates sound pollution and related health hazards like auditory fatigue, deafness etc.
Jet planes generally produce sound above 160 dB which is much more than normal level, thus they also produce sound pollution. But as jet aeroplanes are used for some special purposes, they normally do not land in common airports. Thus it has no direct relation in causing sound pollution and related hazards in areas nearby very busy airports.

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): In C3 plants, photosynthesis is reduced on high temperature.
Reason (R): C4 plants have high photosynthesis of high temperature.

Solution:
QUESTION: 140

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason(R) just below it.Read the Statement carefully and mark the correct answer-
Assertion(A): Shoot apex is protected by young buds.
Reason (R): Reproductive shoot apex is protected also by leaf primordia.

Solution:
QUESTION: 141

In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R).
Read the statements carefully, and mark the correct answer.
Assertion(A): Photomodulation of flowering is a phytochrome - regulated process.
Reason(R): Active form of phytochrome (Pfr) directly induces floral induction in shoot buds.

Solution:

Flowering is a phytochrome regulated process.Phytochrome is a blue protein pigment with a molecular mass of about 125 kDa.Phytochrome occurs in two interconvertible forms PR which absorbs red light and PFR which absorbs far red light.
PFR is active form of phytochrome.When PR molecules are exposed to red light most of them absorb it and are then converted to PFR. This cnversion causes floral induction in the shoot.

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 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: 143

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): There are several types of chlorophylls.
Reason (R): Chlorophyll is an asymmetrical molecule.

Solution:
QUESTION: 144

A condition called tachycardia exists when a person’s heart rate is abnormally high. Which of the following explains how tachycardia may arise?

Solution:
QUESTION: 145

Cellulose is

Solution:
QUESTION: 146

Which of these does not belong with the others?

Solution: Lipase is a enzyme...while remaining are sugars..
QUESTION: 147

Maximum calories are produced by-

Solution:
QUESTION: 148

The enamel of tooth is secreted by

Solution:
QUESTION: 149

Pesticides kill

Solution:
QUESTION: 150

International Rice Research Institute (IRRI) is located at

Solution:
QUESTION: 151

Cotton fibres are made up of

Solution:
QUESTION: 152

Duchenne's muscular dystrophy is a

Solution:
QUESTION: 153

The enzyme responsible for transcription is

Solution:
QUESTION: 154

Dryopithecus had

Solution:
QUESTION: 155

Reverse transcriptase is also known as

Solution:
QUESTION: 156

When the two genetic loci produce identical phenotypes in cis and trans position, they are considered to be

Solution:
QUESTION: 157

Surgical removal of thymus of a new born shall result in failure to produce

Solution:
QUESTION: 158

Bacteria which convert atmospheric nitrogen into nitrogen compounds are called

Solution:
QUESTION: 159

Antibody is connected with

Solution:
QUESTION: 160

Salmonella causes

Solution:
QUESTION: 161

AIDS spreads through

Solution:
QUESTION: 162

Immunoglobin found in serum is

Solution:
QUESTION: 163

Edible part of Cauliflower is

Solution:
QUESTION: 164

At a synapse, the neurotransmitters move to the receptor sites by

Solution:
QUESTION: 165

Rotation of crops is useful for

Solution:
QUESTION: 166

Which of the following compounds are widely distributed in both plants and animals?

Solution:
QUESTION: 167

Vascular bundles are absent in

Solution:

A/c to option most preferable Ans is c Becoz vascular bundle is not well develope in pteridophyta so optionC is correct.

QUESTION: 168

Who proved that oxygen envolved in photosynthesis comes from water?

Solution:
QUESTION: 169

In the two light reactions of photosynthesis

Solution:
QUESTION: 170

Some effects of sulphur dioxide and its transformation products on plant include