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# AIIMS Full Mock Test 20

## 200 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Full Mock Test 20

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This mock test of AIIMS Full Mock Test 20 for NEET helps you for every NEET entrance exam. This contains 200 Multiple Choice Questions for NEET AIIMS Full Mock Test 20 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Full Mock Test 20 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Full Mock Test 20 exercise for a better result in the exam. You can find other AIIMS Full Mock Test 20 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

Solution:
QUESTION: 3

### A capacitor of capacity 50 μF is connected to a constant source of emf 20 volt as shown in figure. Here R2 = 2 KΩ. The amount of heat produced in R1 = 3 KΩ, when the key is shifted from contact 3 to 2, is

Solution:
QUESTION: 4

A charged particle is moving in a uniform magnetic field in a circular path of radius R. When energy of the particle is doubled, then new radius will be

Solution:
QUESTION: 5

Magnetic susceptibility is positive and small for a

Solution:
QUESTION: 6

In a series LCR circuit the frequency of a 20 V AC voltage source is adjacent in such a fashion that the reactance of the inductor measures 30Ω and that of the capacitor is 22 Ω. If resistance R is 6 Ω, then the potential difference across the series combination of L and C will be

Solution:
QUESTION: 7

A perfectly reflecting mirror has an area of 2 cm2. Light energy is allowed to fall on it for 30 minute at the rate of 15 × 104 watt/m2. The force that acts on the mirror is

Solution:
QUESTION: 8

A small object is placed at a distance of 8 cmfrom a convex mirror of radius of curvature 24cm. The magnification of the image obtained is

Solution:
QUESTION: 9

A ray of light travels from an optically denserto a rarer medium. The critical angle for thetwo media is C. Without total internal reflectionthe maximum possible deviation of the raywill be

Solution:
QUESTION: 10

A plano-convex lens has refractive index 1.4and its radius of curvature is 40 cm. The focal length of the lens is

Solution:
QUESTION: 11

A telescope has an objective lens of focal length1 m and an eye piece with focal length 2 cm. Ifthis telescope is used to see a 25 m tall building at a distance of 1 km, then the height of theimage of the building formed by the objectivelens would be

Solution:
QUESTION: 12

In the following diagram all the wires are of same material and have uniform cross-section. The magnitude of magnetic field at the centre O of the square due to arm AB is B1 and dueto the arm CD is B2 then the ratio B1/B2 IS

Solution:
QUESTION: 13

After the half lives, 8 g of radioactive material remains in a sample. What will be the amount of substance at t = 0 s ?

Solution:
QUESTION: 14

In the given circuit the output y is given by

Solution:
QUESTION: 15

In the given figure a convex lens and concave mirror are separated by 40 cm. Position of final image is (from the pole of mirror)

Solution:
QUESTION: 16

In YDSE the fringe width is 0.06 mm. If thewavelength of light used is increased by 25%and the slit separation is decreased by 25% then fringe width will be

Solution:
QUESTION: 17

An unpolarised light of intensity I0 is incidenton a pair of two polaroids held coaxially such that their transmission axes make an angle of 30° with each other. The fraction of intensity oflight emerging from the pair is

Solution:
QUESTION: 18

The refracting angle of a prism is A and thecritical angle of the medium of the prism is QC.There will be no emergent ray when

Solution:
QUESTION: 19

If λ is de-Broglie wavelength of electron movingin nth orbit, then the radius of 3rd orbit in hydrogen atom is

Solution:
QUESTION: 20

Sky wave propagation can be used for frequencies

Solution:
QUESTION: 21

In a common emitter configuration collectorcurrent and emitter current are 3.09 mA and 3.19 mA respectively. The current gain in this configuration is

Solution:
QUESTION: 22

An arc of radius R is charged. The linear density of charge is λ and the arc subtends an angle 3/π at the centre. What is electric potential at the centre ?

Solution:
QUESTION: 23

In photoelectric effect, the electrons are ejectedfrom metals if the incident light has certain maximum

Solution:
QUESTION: 24

Current in the following circuit will be

Solution:
QUESTION: 25

Stopping potential in photoelectric experimentfor a given metal surface

Solution:
QUESTION: 26

A man runs towards a stationary plane mirror with velocity 15 m/s. Magnitude of velocity of the man relative to his image is

Solution:
QUESTION: 27

If ratio of amplitudes of two coherent sources producing an interference pattern is 3 : 4, then ratio of intensities at maxima and minima is

Solution:
QUESTION: 28

The sun maintains its brightness due to which of the following reactions in its core ?

Solution:
QUESTION: 29

The equivalent resistance between P and Q in  the network shown is

Solution:
QUESTION: 30

Torque on a current carrying coil is maximumin a uniform magnetic field, when

Solution:
QUESTION: 31

The electric potential due to uniformly charged spherical shell of radius R and charge Q at distance r from center is (R < r)

Solution:
QUESTION: 32

A parallel plate capacitor has plates each of area A and separation d. If both the plate joined by conductor as shown, then capacitance C is

Solution:
QUESTION: 33

A dielectric of dielectric constant K is filled between plates of a parallel plate capacitor. When it is kept closed to A, midway between A & B and closed to B, capacitance in these cases are C1, C2 and C3 respectively, then

Solution:
QUESTION: 34

Which of the following graphs represents resistivity (p) with temperature (T) for semiconductor approximately ?

Solution:
QUESTION: 35

If the horizontal component of earth’s magnetic field is more than vertical component of earth’s magnetic field at a place, then angle of true dipat that place can be

Solution:
QUESTION: 36

A wire of fixed length is wound on a solenoid of length l and radius r and its self inductance is found to be L. Now if same wire is wound ona solenoid of length l/2 and radius r/2 , then theself inductance will be

Solution:
QUESTION: 37

Magnetic flux through a closed loop changes according to equation (φ) = 3t2 - 6t, where φ is in weber and t is in second. At what time instantaneous emf induced is zero.

Solution:
QUESTION: 38

Which of the following graph correctly shows the variation of capacitive reactance XC with frequency f ?

Solution:
QUESTION: 39

The power factor of LCR series circuit cannot be

Solution:
QUESTION: 40

In plane electromagnetic wave if average electric energy density is u, then average magnetic energy density is

Solution:
QUESTION: 41

A: Short wave bands are used for transmission of radio waves to a large distance.
R : Short waves are reflected by ionosphere

Solution:
QUESTION: 42

A: The speed of light in a rarer medium is greater than that in a denser medium.
R : One light year equals to 9.5 × 1012 km

Solution:
QUESTION: 43

A: The refractive index of a prism depends only on the kind of glass of which it is made of and the colour of light.
R : The refractive index of a prism depends upon the refracting angle of the prism and the angle of minimum deviation

Solution:
QUESTION: 44

A: Ultraviolet radiations of higher frequency waves are dangerous to human being.
R : Ultraviolet radiation are absorbed by the atmosphere.

Solution:
QUESTION: 45

A: The cloud in sky generally appears to be whitish.
R : Diffraction due to clouds is efficient in equal measure at all wavelengths

Solution:
QUESTION: 46

A: The stars twinkle while the planets do not.
R : The stars are much bigger in size than the planets.

Solution:
QUESTION: 47

A: In common base configuration, the current gain of the transistor is less than unity.
R : The collector terminal is reverse biased for amplification.

Solution:
QUESTION: 48

A: Cobalt-60 is useful in cancer therapy.
R : Cobalt-60 is source of λ-radiations capable of killing cancerous cell.

Solution:
QUESTION: 49

A: If the temperature of a semiconductor is increased then it's resistance decreases.
R : The energy gap between conduction band and valence band is very small

Solution:
QUESTION: 50

A: The binding energy per nucleon, for nuclei with atomic mass number A > 100, decreases with A.
R : The nuclear forces are weak for heavier nuclei.

Solution:
QUESTION: 51

A: An emf is induced in a closed loop where magnetic flux is varied. The induced is not aconservative field.

R : The line integral  around the closed loop is non zero.

Solution:
QUESTION: 52

A: Electrons move away from a low potential to high potential region.
R : Because electrons have negative charge.

Solution:
QUESTION: 53

A: If three capacitors of capacitance C1 < C2 < C3 are connected in parallel then their equivalent capacitance Cp > C3

Solution:
QUESTION: 54

A: The capacity of a given conductor remains same even if charge is varied on it.
R : Capacitance depends upon nearly medium as well as size and shape of conductor.

Solution:
QUESTION: 55

A: Electromagnet are made of soft iron.
R : Coercivity of soft iron is small.

Solution:
QUESTION: 56

A: A metallic shield in form of a hollow shell may be built to block an electric field.
R : In a hollow spherical shield, the electric field inside it is zero at every point.

Solution:
QUESTION: 57

A: Blue colour of sky appears due to scattering of blue colour.
R : Blue colour has shortest wave length in visible spectrum.

Solution:
QUESTION: 58

A: X-ray travel with the speed of light.
R : X-rays are electromagnetic rays.

Solution:
QUESTION: 59

A. undergoes 2 α - decays, 2β- decays and 2γ-decays and the daughter product is

R : In α- decays the mass number decreases by 4 and atomic number decrease by 2 . In β-decays the mass number remains unchanged, but atomic number increase by 1 only.

Solution:
QUESTION: 60

A: Speed of wave = time period / wavelength .
R :Wavelength is the distance between two nearest particles in phase.

Solution:
QUESTION: 61

A gas X at 1 atm is bubbled through a solutioncontaining a mixture of 1 M Y and 1 M Z at 25°C. If the reduction potential of Z > Y > X;then

Solution:
QUESTION: 62

Acidified chromic acid + H2O X and Y are

Solution:
QUESTION: 63

The number of unit cells in 58.5 g of NaCl is nearly :

Solution:
QUESTION: 64

The number of atoms in a face-centred cubicunit cell are-

Solution:
QUESTION: 65

A reaction having equal activation energies for forward and reverse reaction has-

Solution:
QUESTION: 66

The inversion of cane sugar is represented byC12H22O11 + H2O C6H12O6 + C6H12OIt is a reaction of :

Solution:
QUESTION: 67

Which of the following statements is not applicable to chemisorption ?

Solution:
QUESTION: 68

In electrolysis of dilute H2SO4 using platinum electrodes :

Solution:
QUESTION: 69

The osmotic pressure at 17ºC of an aqueous solution containing 1.75 g of sucrose per 150 mL solution is-

Solution:
QUESTION: 70

For the reaction, 3A → Product, the rate law is rate = k[A]2. Half life of reaction is given by

Solution:
QUESTION: 71

Equal moles of benzene and toluene are mixed.The vapour pressures of benzene and toluene in pure state are 700 and 600 mm Hg respectively.The mole fraction of benzene in vapourstate is

Solution:
QUESTION: 72

reduction potentential of hydrogen electrode having a solution of pH 3 is (at 298 K and H2 gasis passed at 1 atm pressure)

Solution:
QUESTION: 73

pKa of 0.01 M weak acid is 6. pH of the acid will be

Solution:
QUESTION: 74

Which of the following mixture can act as buffersolution ?

Solution:
QUESTION: 75

Which of the following will not be soluble insodium hydrogen carbonate?

Solution:
QUESTION: 76

Which of the following will be most stable diazonium salt

Solution:
QUESTION: 77

Which of the following organic compounds hassame hybridization as its combustion product-(CO2)?

Solution:
QUESTION: 78

What products are formed when the following compound is treated with Br2 in the presence of FeBr3?

Solution:
QUESTION: 79

The IUPAC name of

Solution:
QUESTION: 80

Which order is correct regarding stability ofintermediates.

Solution:
QUESTION: 81

The number of structural isomers of C3H5Br3 is

Solution:
QUESTION: 82

Which of the following have zero dipolemoment?

Solution:
QUESTION: 83

Solution:
QUESTION: 84

Which will give white ppt. with AgNO3?

Solution:
QUESTION: 85

When CH2=CH–COOH is reduced with LiAlH4, the compound obtained will be –

Solution:
QUESTION: 86

In the given reaction :

(a) and (b) respectively be :

Solution:
QUESTION: 87

Number of products (excluding stereoisomers)in the given reaction :

Solution:
QUESTION: 88

Product

Solution:
QUESTION: 89

Calcination is the process of heating the ore:

Solution:
QUESTION: 90

Which of the following does not contain Mg:

Solution:
QUESTION: 91

Refining of silver is done by:

Solution:
QUESTION: 92

In which of the following isolations no reducing agent is required:

Solution:
QUESTION: 93

Haber’s process, Mo is used as

N2(g) + 3H2 (g)  2NH3 (g);

Solution:
QUESTION: 94

X and Y are respectively.

Solution:
QUESTION: 95

Solution:
QUESTION: 96

Each of the following obey sidewick effective atomic number rule except

Solution:
QUESTION: 97

The magnitude of crystal field stabilisation energy in octahedral field depends on

I : the nature of the ligand

II : the charge on the metal ion

III : whether the metal is in the first, second orthird row of the transition elements.

Solution:
QUESTION: 98

Which of the following ligands is called π - acceptors ?

Solution:
QUESTION: 99

From the stability constant (hypothetical values), given below, predict which is the strongest ligand:

Solution:
QUESTION: 100

An orange solid (X) on heating, gives a colourless gas (Y) and a only green residue (Z). Gas (Y) on treatment with Mg, produces a white solid substance .................

Solution:
QUESTION: 101

A : NaCl forms an ionic crystal.
R : In NaCl atoms have electrostatic forces of attraction.

Solution:
QUESTION: 102

A : No compound has both Schottky and Frenkel defects.
R : Both defects change the density of the solids

Solution:
QUESTION: 103

A : If more and more solute is added to a solvent, the freezing point of the solution keeps on becoming higher and higher.
R : Presence of large amount of the solid solute does not allow the solution to freeze.

Solution:
QUESTION: 104

A : Silica gel is used for drying air.
R : Silica gel adsorbs moisture from air.

Solution:
QUESTION: 105

A : Conductance of a substance increases with decrease in resistance.
R : The inverse of resistance is called conductance.

Solution:
QUESTION: 106

A: For the reaction
H2(g) + I2 → 2HI (g),
Rate = K[H2][I2]

R: Rate of fornation of hydrogen iodide is proportional to the concentration of hydrogen and Iodine.

Solution:
QUESTION: 107

​A : If in a zero order reaction, the concentration of the reactant is doubled, the half-life period is also doubled.
R : For a zero order reaction, the rate of reaction is independent of initial concentration.

Solution:
QUESTION: 108

A : p-Hydroxybenzoic acid has a lower boiling point than o-hydroxybenzoic acid. because
R : o-Hydroxybenzoic acid has intermolecular hydrogen bonding.

Solution:
QUESTION: 109

A : Basicity of CH3CH2NH2(I), NH3(II) and C6H5NH2(III) is in order I > II > III
R : Electron-donating groups (such as alkyl group) increase the basicity of amines, and electron-withdrawing groups (such as aryl group) decrease the basicity of amines.

Solution:
QUESTION: 110

A : Nitrobenzene is used as a solvent in Friedel-Craft's reaction.
R : Fusion of nitrobenzene with solid KOH gives a low yield of a mixture of o- and p-nitrophenols.

Solution:
QUESTION: 111

A : Grignard reagent reacts with aldehydes and ketones to form alcohol.
R : Alcohols have acidic hydrogen.

Solution:
QUESTION: 112

A : CH3OH is a nucleophile.
R : CH3OH forms sodium methoxide on treatment with NaOH.

Solution:
QUESTION: 113

A : N2 S reaction takes place in single step.
R : N2 S reaction involves the reactivity order of alkyl halides as 1° > 2° > 3° halides

Solution:
QUESTION: 114

A : Platinum and gold occur in native state in nature.
R : Platinum and gold are noble metals.

Solution:
QUESTION: 115

A : Al is used as a reducing agent in aluminothermy.
R : Al has a lower melting point than Fe, Cr and Mn

Solution:
QUESTION: 116

A : The highest oxidation state of chromium in its compounds is 6+.
R : Chromium atom has only six electrons in ns and (n–1) d orbitals.

Solution:
QUESTION: 117

A : [Co(NH3)3 Cl3] does not give a white precipitate with AgNOSolution.

R : Chlorine is not present in the ionisation sphere of [Co(NH3)3Cl3]

Solution:
QUESTION: 118

A: Cis-isomer of [Co(en)2Cl2)]Cl shows optical activity.

R: Cis-siomer of [Co(en)2Cl2] is a symmetric molecule.

Solution:
QUESTION: 119

A: Complexes containing three bidentate groups such as [Cr(ox)3]3- and [Co(en)3]3+ do not show optical activity.

R: Octahedral complex , [Co(NH3)4Cl2]Cl shows geometrical isomerism.

Solution:
QUESTION: 120

A: KMnO4 is purple in colour due to charge transfer

R: In  , there is no electron present in d-orbitals of manganese.

Solution:
QUESTION: 121

Consider the following statements (a-d) about“terror of Bengal”

.a. An aquatic plant which can propagate vegetatively at a phenomenal rate.

b. One of the most invasie weeds growing in standing water.

c. It drains oxygen from water which leads to death of fishes.

d. It was introduced in Bengal because of its beautiful flowers and shape of fruits.

Which of the above statements are correct?

Solution:
QUESTION: 122

Given below figure represents some structures of (A) and (B). Identify these structures

Solution:
QUESTION: 123

What will be the ploidy of secondary nucleus PEN if the cross is made between 4n   plant  and 8n plant.

Solution:
QUESTION: 124

Find the incorrect statement

Solution:
QUESTION: 125

Match the Column-I with Column-II correctly

Solution:
QUESTION: 126

Which of the following is incorrect w.r.t. SCP?

Solution:
QUESTION: 127

Which of the following statement is incorrect w.r.t. micropropagationa.

(a) It is helpful for somaclonar variationb.

(b) It helps in rapid multiplication of endangered speciesc.

(c) It is more economical for plant propagationd.

(d) It is useful for production of new variants

Solution:
QUESTION: 128

Select the correct match with respect to crop,variety and resistance to diseases

Solution:
QUESTION: 129

Find the incorrect statement

Solution:
QUESTION: 130

A typical agarose gel electrophoresis showning migration of digested DNA fragments

Solution:
QUESTION: 131

Which of the following statement is correct?

Solution:
QUESTION: 132

Mark the incorrect one w.r.t. Exotic species

Solution:
QUESTION: 133

Key industry animals are

Solution:
QUESTION: 134

Raunkiaer, grouped species into Five frequency classes A, B, C, D and E. Which one of the following is the correct representation of Raunkiaer’s frequency classes

Solution:
QUESTION: 135

In Bryophyllum vegetative propagation is brought about by

Solution:
QUESTION: 136

What is true for cotyledon is grass family?

Solution:
QUESTION: 137

Which one of the following pair is wrongly matched?

Solution:
QUESTION: 138

Match the following (Column-I with Column- II)

Solution:
QUESTION: 139

There are two opposing views about origin of modern man. According to one view Homo erectus in Aisa were the ancestors of modern man. A study of variation in DNA, however suggested African origin of modern man. What kind of observation of DNA variation could sugest this?

Solution:
QUESTION: 140

Which is correct about the protein brazzein which was patented in USA by America?

Solution:
QUESTION: 141

Maximum average height of plant is 60" and that of minimum is 20". The height of the plant with genotype aaBbCcDD will be

Solution:
QUESTION: 142

Plants that complete their life cycle during rainy season and pass rest of their time in the form of seeds are called

Solution:
QUESTION: 143

The above given pedigree can’t be a/an

Solution:
QUESTION: 144

In a trihybrid cross between AABBCC and aabbcc the ratio of AaBbcc, aaBbCc, AAbbCc, aaBBCc in F2 generation is

Solution:
QUESTION: 145

Identify the label A, B, C and D in given structre of tRNA & select the correct option

Solution:
QUESTION: 146

Organic evolution would not have taken place if

Solution:
QUESTION: 147

(a) Propionibacterium sharmani is use to produce swiss cheeseb.

(b)Streptokinase is uses as clot busterc.

(c) Cyclosporian A is used as cholesterol lowering agentd.

(d)Statins produce by monascus purpureus

Find the incorrect options

Solution:
QUESTION: 148

Consider the following sample area (1) and (2) and indicate the correct answer :
Sample Area-1 : There are three species of birds. Two species are represented by one individuals each, while the third species has four individuals.

Sample Area-2 : There are three species of birds and each species are represnted by two idividuals.

Solution:
QUESTION: 149

Species diversity increases as one proceeds from

Solution:
QUESTION: 150

Edge effect is

Solution:
QUESTION: 151

Identify the plant given below :Choose the incorrect statement w.r.t. drug obtained from the given plant :

Solution:
QUESTION: 152

Which of the following pair is mismatched?

Solution:
QUESTION: 153

Which of the following is incorrectly matched pair of structure w.r.t. function?

Solution:
QUESTION: 154

The following graph shows the range of variation among population members for a trait determined by multiple genes

If this population is subject to stabilising selection for several generations, which of the distribution is most likely to result?

Solution:
QUESTION: 155

Which of the following is the correct sequence fo the layers in the mature follicle from inside to outside?

a. Zona pellucida

b. Membrana granulosac.

d. Plasma membrane of ovume.

f. Theca interna

Solution:
QUESTION: 156

Which of the following mophogenetic movements involves the rolling in of chordamesoderm cells towards anterior side along the roof of blastocoel?

Solution:
QUESTION: 157

Which of the following applications can be used to avoid possible pregnancy within 72 hours of coitus due to rape or casual unprotected intercourse?

a. Progestogensb.

b. Progestogen-estrogen combinationc.

c. IUDd.

d. i-pills

Solution:
QUESTION: 158

Choose the correct type of placenta with number of barriers w.r.t. human beings

Solution:
QUESTION: 159

Placental mammals in Australia exhibit adaptive radiation in evolving into varieties of placental mammals each of which appears to be similar to a corresponding marsupial. What kind of evolution is exhibited by them w.r.t. each other?

Solution:
QUESTION: 160

What does not normally happen during gastrulation?

Solution:
QUESTION: 161

A : In Penicillium, asexual reproductive structures are formed on sterigmata.
R :The conidiophore is unbranched and coenocytic.

Solution:
QUESTION: 162

A : Human skin colour is an example of polygenic inheritance.
R : It is controlled by more than one gene.

Solution:
QUESTION: 163

A : The physical distance between two genes determines both the strength of linkage and frequency of crossing over between two genes.
R :One cross-over reduces the occurrence of another cross-over in its vicinity.