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# NEET Mock Test - 12 (29-03-2020)

## 180 Questions MCQ Test NEET Mock Test Series 2020 & Past Year Papers | NEET Mock Test - 12 (29-03-2020)

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This mock test of NEET Mock Test - 12 (29-03-2020) for NEET helps you for every NEET entrance exam. This contains 180 Multiple Choice Questions for NEET NEET Mock Test - 12 (29-03-2020) (mcq) to study with solutions a complete question bank. The solved questions answers in this NEET Mock Test - 12 (29-03-2020) quiz give you a good mix of easy questions and tough questions. NEET students definitely take this NEET Mock Test - 12 (29-03-2020) exercise for a better result in the exam. You can find other NEET Mock Test - 12 (29-03-2020) extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

### According toMoseley's law, the frequency of a spectral line in X - ray spectrum varies as

Solution: Yes the graph is nu(frequency) vs √Z(atomic number). Moseley plotted this graph and obtained a straight line and hence concluded that periodic properties of an element are function of their atomic number and not atomic mass.
QUESTION: 3

### The force on an electron moving with a velocity 'v' in a field of magnetic induction 'B' acting perpendicular to it is

Solution:
QUESTION: 4

The photo electric threshold wave length for potassium (work function being 2eV) is

Solution:
QUESTION: 5

A stone of mass 1 kg tied to a light inextensible string of length L = 10/3 m is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the string is 4 and if g is taken to be 10 m/sec2, the speed of the stone at the highest point of the circle is

Solution: QUESTION: 6

In a circuit, n identical bulbs, each of power 'P' are joined in series across a power supply. The total power drawn by the bulbs is

Solution:
QUESTION: 7

The equivalent resistance between the terminals P and Q of infinite network as shown in the figure is Solution:
QUESTION: 8

Mixed He⁺ and o2⁺ ions (mass of He⁺ = 4 amu and that of o2⁺ = 16 amu) beam passes a region of constant perpendicualr magnetic field. If kinetic energy of all the ions is same then

Solution:
QUESTION: 9

Which of the following phenomena is observed when black discharge occurs in a discharge tube ?

Solution: The opposite wall of cathode of discharge tube was coated with phosphorescent material like ZnS . since the ray consisted of material particle, that is, electron, it caused the wall to glow.
QUESTION: 10

Light of two different frequencies whose photons have energies leV and 2.5eV respectively, successively illuminates a metal of work function 0.5eV. The ratio of maximum kinetic energy of the emitted electron will be

Solution: According to photoelectric equation if energy of photon>work function of metal then energy of photon- work function = kinetic energy of electron then ratio = 1-0.5/2.5-0.5=0.5/2=1:4
QUESTION: 11

Photoelectric effect proves the

Solution:
QUESTION: 12

The current passing through a coil of 5 H is decreasing at the rate of 2 A/s. The emf developed in the coil is

Solution:
QUESTION: 13

An electromagnetic wave passing through vacuum is described by the equations: E = E₀ sin (kx-ωt) and B = B₀ sin (Kx-ωt). Then

Solution:
QUESTION: 14

The idea of displacement current was introduced by

Solution:
QUESTION: 15

A neutral sphere of radius r and density ρ is intended to be suspended with an electric field E existing on earth's surface directed vertically up. What fraction of the electrons should be removed from the sphere? Given that, the atomic number and atomic mass of material of the sphere are Z and A respectively. Avogadro's number is NA. Assume that the sphere is able to hold the necessary charge without any leakage.

Solution:
QUESTION: 16

The two point charges of 2C are -6C attract each other with a force of 12N. A -ve charge of 2C is added to each of the above charges. Now the force between them is

Solution: Q1= -2C+2C=0C
q2=-2C+(-6C) = -8C
since one of the charge is zero, force will be zero.
QUESTION: 17

If the rotational speed of earth is increased, then weight of a body at the equator

Solution:
QUESTION: 18

Which of the following is the example of ideal black body

Solution:
QUESTION: 19

When the pressure on 1200 ml of a gas is increased from 70 cm to 120 cm of mercury at constant temperature, then new volume of the gas will be

Solution:
QUESTION: 20

A body of mass 10 kg lies on a rough horizontal surface. When a horizontal force of F newtons acts on it, it gets an acceleration of 5 m−s⁻2. And when the horizontal force is doubled, it gets an acceleration of 18 m−s⁻2. The coefficient of friction between the body and the horizontal surface is (Take g = 10 m−s⁻2)

Solution:
QUESTION: 21

The magnetic force acting on a charged particle of charge − 2μC in a magnetic field of 2T acting in y direction, when the particle velocity is Solution:
QUESTION: 22

A bar magnet of pole strength 2 A-m is kept in a magnetic field of induction 4 x 10−5 wbm−2 such that the axis of the magnet makes an angle 30° with the direction of the field. The couple acting on the magnet is found to be 80 x 10−7 N - m . Then the distance between the poles of the magnet is

Solution:
QUESTION: 23

At a certain place, the horizontal component of the earth's magnetic field is B₀, and the angle of dip is 60°. The intensity of earth's magnetic field at that place will be

Solution:
The horizontal component of the electric field is given by
BH = Becos(θ)
where θ is the angle of dip at the given place
Be is teh net magnetic field
At θ = 60degree
BH = Be cos(60) = Be x (1/2)
Be = 2BH = 2B (given BH =B)
Now horizontal component at equator
BH = Becos (θ)
angle of dip at equator is 0
BH = Becos(0) = Be = 2B
BH = 2B
QUESTION: 24

The rate of flow of water in a capillary tube of length 'l' and radius 'r' is 'V'. The rate of flow in another capillary tube of length '2l' and radius '2r' for same pressure difference would be

Solution:
QUESTION: 25

The breaking stress of a wire depends upon

Solution:
QUESTION: 26

Which of the following is more effective in inducing nuclear fission

Solution:
QUESTION: 27

A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute. After 5 min, the rate is 1250 disintegrations per min. Then, the decay constant (per minute) is

Solution:
QUESTION: 28

Nuclear fusion occur in

Solution:
QUESTION: 29

A coin is placed on a horizontal platform, which undergoes vertical simple harmonic motion of angular frequency ω. The amplitude of oscillations is gradually increased. The coin will have contact with the platform for the first time. (i) at the higher position of the platform (ii) at the mean position of the patform (iii) for an amplitude of g/ω2 (iv) for an amplitude of √2/ω

Solution:
QUESTION: 30

An equiconvex lens of glass of focal length 0.1 m is cut along a plane ⊥ er to principal axis into two equal parts. The ratio of focal length of new lenses formed is

Solution:
QUESTION: 31

A clock is held facing a plane mirror. From the point of view of a person looking into the mirror, does the image of the second hand rotate

Solution:
QUESTION: 32

A person standing on a rotating platform has his hands lowered. He suddenly outstretches his arms. The angular momentum

Solution:
QUESTION: 33

A hollow cylinder A and a solid cylinder B of the same mass and outer diameter are released from a point on an inclined plane. They roll down without slippling. Which reaches the bottom first?

Solution:
QUESTION: 34

The length of the second pendulum on the surface of earth is 1 m. The length of second's pendulum on the surface of moon, where g is 1/6th value of g on the surface of earth, is

Solution:
QUESTION: 35

The potential barrier, in the depletion of layer, is due to

Solution:
QUESTION: 36

In a P-type semiconductor

Solution:
QUESTION: 37

The negative Zn pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by 0.13 g in 30 min. If the electrochemical equivalents of Zn and Cu are 32.5 and 31.5 respectively, then increase in the mass of positive Cu pole in this time is

Solution:
QUESTION: 38

22 gram of CO₂ at 27°C is mixed with 16 gram of oxygen at 37°C. The temp. of the mixture is

Solution:
QUESTION: 39

A Carnot engine has an efficiency of 25%. If energy is fed into the engine at the rate of 1 kW, then the output of the engine is

Solution:
QUESTION: 40

A highly rigid cubical block A of small mass M and side L is fixed rigidly onto another cubical block B of the same dimensions and of low modulus of rigidity η such that the lower face of A completely covers the upper face of B. The surface lower face of B is rigidity held on a horizontal surface A small force F is applied perpendicular to one of the side faces of A. After the force is withdrawn block A executes small oscillations. The time period of which is given by

Solution:
QUESTION: 41

Doppler effect is applicable for

Solution:
QUESTION: 42

The equation of a transverse wave is given by y = 5 sin (12 t-0.02 x), where y and x are in centemeters and time (t)is in seconds. What is the frequency of the wave?

Solution:
QUESTION: 43

A body of mass 5 kg explodes at rest into three fragments with masses in the ratio 1 : 1 : 3. The fragments with equal masses fly in mutually perpendicular directions with speeds of 21 m/s. The velocity of the heaviest fragment will be

Solution:
QUESTION: 44

A spring of force costant 10 N/m has an initial stretch 0.20 m. In changing the stretch to 0.25 m, the increase in potential energy is about

Solution:
QUESTION: 45

Two identical cylindrical vessels with their bases at same level each contains a liquid of density ρ. The height of the liquid in one vessel is h1 and that in the other vessel is h1. The area of either base is A. The work done by gravity in equalizing the levels when the two vessels are connected, is

Solution:

The work done by gravity equals the change in the potential energy of the system after the vessels are interconnected. The liquid in each vessel as equivalent to a point mass kept at their respective centres of mass. The mass of the liquid is given by (Ahρ) and that the PE of a mass at a height h in earth's gravity is mgh, we have
Total PE at start  =  After the vessels are connected, the height of liquid in each vessel is Hence PE after connection This must be equal to the work done 'by' gravity on the liquid.
Thus the work done 'by' gravity is QUESTION: 46

Reaction of tert-butyl bromide with sodium methoxide produces

Solution:
QUESTION: 47

In which of the following reactions, both oxidised and reduced forms of the same compound are obtained?

Solution:
QUESTION: 48

Which one of the following atomic orbitals is not directed along the axis?

Solution:
QUESTION: 49

According to Bohr's theory, the energy required for the transition of H atom from n = 6 to n = 8 state is

Solution:
QUESTION: 50

The compound with carbon uses only its sp3 hybrid orbitals for bond formation is

Solution: QUESTION: 51

A σ - bond is

Solution:
QUESTION: 52

Which of the following is the strongest acid?

Solution:
QUESTION: 53

Lipids are

Solution:
QUESTION: 54

Which of the following pair of molecules will have permanent dipole moments for both members?

Solution:
QUESTION: 55

The boiling point of para nitrophenol is greater than that of ortho nitrophenol, because

Solution:
QUESTION: 56

Given that
C(s) + O₂(g) → CO₂(g); ∆H = - 395 KJ
S(s) + O₂(g) → SO₂(g); ∆H = -295 KJ
CS₂(l) + 3O₂(g) → CO₂(g) + 2SO₂(g); ∆H + -1110 KJ
The heat of formation of CS₂ is

Solution:
QUESTION: 57

How much energy is released when 6 mol of octane is burnt in air ? Given that ∆fH° for CO₂(g),H₂O(g) and C₈H₁₈(l) respectively are -490,-240 and + 160 KJ mol⁻1.

Solution:
QUESTION: 58

In photochemical reactions, the temperature

Solution:
QUESTION: 59

The law of mass action was encunciated by __

Solution:
QUESTION: 60

When 10gram of methane is completely burnt in oxygen, the heat evolved is 560kJ. What is the heat of combustion (in kJ/mole) of methane?

Solution:
QUESTION: 61

Hess's law deals with

Solution:
QUESTION: 62

An ester used as medicine is

Solution:
QUESTION: 63

The isomerism exhibited by alkyl cyanide and alkyl isocyanide is

Solution:
QUESTION: 64

Which of the following is not an organometallic compound?

Solution:
QUESTION: 65

Nickel (Z = 28) combines with a uninegative monodentate ligand X − to form a paramagnetic complex [NiX4]2−. The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively

Solution:
QUESTION: 66

Which of the following is not a strong electrolyte?

Solution:
QUESTION: 67

In a solution of CuSO₄ how much time will be required to precipiate 2g copper by 0.5 ampere current?

Solution:
QUESTION: 68

Oxidation number of S in H₂S₂O₈ is

Solution:
QUESTION: 69

Depletion of ozone layer causes

Solution:
QUESTION: 70

Galena is an ore of

Solution:
QUESTION: 71

The pair of amphoteric hydroxides is

Solution:
QUESTION: 72

Which one of the following indicates the value of the gas constant R ?

Solution:
QUESTION: 73

Optical glass contains a high percentage of

Solution:
QUESTION: 74

Equal weights of methane and hydrogen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by hydrogen is

Solution:
QUESTION: 75

The following acids have been arranged in the order of decreasing acid strength. Identify the correct order. ClOH(I) BrOH (II) IOH (III)

Solution:
QUESTION: 76

Which of the following sulphides has the lowest solubility product ?

Solution:
QUESTION: 77

Which of the following amines will lose its nitrogen atom as trimethylamine by repeated Hofmann elimination reactions?

Solution:
QUESTION: 78

OUT OF Ca2⁺,Al3⁺,Bi3⁺,Mg2⁺ and Zn2⁺ the reagents NH₄Cl and aqueous NH₃ will precipitate

Solution:
QUESTION: 79

Which is not the resonance structure of aniline?

Solution:
QUESTION: 80

Solution:
QUESTION: 81

An organic compound containing C=40%, H=13.33% and N=46.67%. Its empirical formula would be

Solution:
QUESTION: 82

Which of the following is used in plants?

Solution:
QUESTION: 83

Leibig method is used for the estimation of

Solution:
QUESTION: 84

0.15 g of a substance dissolved in 15 g of a solvent boiled at a temp. higher by 0.216°C than that of the pure solvent. Find out the molecular weight of the substance. (Kb for solvent is 2.16°C)

Solution:
QUESTION: 85

From the diagram given below which compound cannot be purified by recrystallisation from water Solution:
QUESTION: 86

The rate of physiorption increases with

Solution:
QUESTION: 87

KMnO₄ oxidises oxalic acid in acidic medium. The number of CO₂ molecules produced as per the balanced equation is

Solution:
QUESTION: 88

Water is a/an

Solution:
QUESTION: 89

Highest (+7) oxidation state is shown by

Solution:
QUESTION: 90

Wrought iron, pig iron and steel differ in properties due to

Solution:
QUESTION: 91

Formation of sex cell was first seen in

Solution:
QUESTION: 92

The function of the peristome in moss is

Solution:
QUESTION: 93

Frog is

Solution:
QUESTION: 94

Vascular bundle with protoxylem towards the periphery is

Solution:
QUESTION: 95

In which of the following groups would you place a plant which produces spores and embryos but lacks seeds and vascular tissues-

Solution:
QUESTION: 96

In cell division, cell plate is formed during

Solution: Cytokinesis in plant cells is more complex than in animals, as it involves building a cell plate as the final step in generating two cells.
QUESTION: 97

Experiments to demonstrate importance of nucleus in controlling growth and heredity were perfomed on

Solution:
QUESTION: 98

Cork cells have a deposition of

Solution:
QUESTION: 99

Carbohydrates are present in the plasmalemma in the form of

Solution:
QUESTION: 100

Spindle fibres are formed of

Solution:
QUESTION: 101

Cytosterility in the pollen of Maize is due to

Solution:
QUESTION: 102

Sickle cell anaemia is a

Solution:
QUESTION: 103

Cryptorchidism is a condition in which

Solution:
QUESTION: 104

Sunil's blood type was determined to be AB+. Which of the following is true of Sunil's blood?

Solution:
QUESTION: 105

A matured mammalian (RBC) is unusual because

Solution:
QUESTION: 106

Erythroblastosis foetalis, also known as hemolytic disease of the newborn, most often occurs in ______________ mothers carrying ______________ fetuses.

Solution:
QUESTION: 107

Which factor promotes the appearance of the platelet plug?

Solution:
QUESTION: 108

Contraceptive oral pills help in birth control by :

Solution:
QUESTION: 109

Submerged hydrophytes have a well developed

Solution:
QUESTION: 110

Technique involving transfer of ovum of a donor female into the fallopian tube of recipient female is called :

Solution:
QUESTION: 111

Cholelithiasis refer to

Solution:
QUESTION: 112

Which of the following is not readily absorbed in the small intestine?

Solution:
QUESTION: 113

Ecosystem consists of

Solution:
QUESTION: 114

Renin is

Solution:
QUESTION: 115

Solution:
QUESTION: 116

Which is not a trait of enzymes ?

Solution:
QUESTION: 117

Cycads and Ginkgo are regarded as primitive gymnosperms because -

Solution:
QUESTION: 118

The most nearest prehistoric ancestro of present man may be

Solution:
QUESTION: 119

The winged pollen grains are the characteristic feature of -

Solution:
QUESTION: 120

Glucagon is secreted from which cells of islet of Langerhans ?

Solution:
QUESTION: 121

A person with blood group A possesses

Solution:
QUESTION: 122

Vaccination protects a person from disease because it

Solution:
QUESTION: 123

If both parents of a male child are normal, what are the chances of the child being colourblind?

Solution:
QUESTION: 124

An autoimmune disease is

Solution:
QUESTION: 125

In sickle cell anaemia, there is change in amino acid in β chain at position

Solution:
QUESTION: 126

Membranous labyrinth is concerned with

Solution:
QUESTION: 127

Short lived immunity acquird by foetus/infant from mother through placenta/milk is

Solution:
QUESTION: 128

Male and female cockroaches can be distinguished externally through

Solution:
QUESTION: 129

Name the organism which do not derive energy directly or indirectly from sun

Solution:
QUESTION: 130

Which one is not a snake?

Solution:
QUESTION: 131

Which one is a fungal disease ?

Solution:
QUESTION: 132

AIDS Virus has

Solution:
QUESTION: 133

In photosynthesis, photolysis of water helps in

Solution:
QUESTION: 134

Citrus canker is due to

Solution:
QUESTION: 135

Incomplete metamorphosis occurs in

Solution:
QUESTION: 136

Which of the following is a C₄-plant ?

Solution:
QUESTION: 137

Minerals are absorbed in the form of

Solution:
QUESTION: 138

Solution:
QUESTION: 139

Each ommatidium in the compound eye of insects forms a different but adjacent image and all images combine to form a single coherent picture. It is known as

Solution:
QUESTION: 140

Parasite plants e.g. Viscum absorb water and minerals from host by

Solution:
QUESTION: 141

Wood is a common name of

Solution:
QUESTION: 142

Testes of Earthworm occur segments

Solution:
QUESTION: 143

Ootheca of Earthworm is produced by

Solution:
QUESTION: 144

Pollinia are present in which plant family

Solution:
QUESTION: 145

Stem of submerged hydrophytes is soft and weak because of

Solution:
QUESTION: 146

Which of the following is an example of scaly, imbricate bulb?

Solution:
QUESTION: 147

One of the following organism is rich in riboflavin

Solution:
QUESTION: 148

Which gas of the atmosphere holds up ultraviolet rays

Solution:
QUESTION: 149

Which of the following is a true fish?

Solution:
QUESTION: 150

Use the following information to answer the question.
1. Sodium ions move into the axon.
2. Potassium ions move out of the axon.
3. Depolarization of the membrane occurs.
4. Repolarization of the membrane occurs.

Select the correct order of the above events to describe an Action potential.

Solution:
QUESTION: 151

The organism, used for alcoholic fermentation, is

Solution:
QUESTION: 152

Variations observed during tissue culture of some plants are known as

Solution:
QUESTION: 153

Pure vaccines are

Solution:
QUESTION: 154

Well known immune proteins are

Solution:
QUESTION: 155

Large number of bacteria produced from a single bacterium is called

Solution:
QUESTION: 156

The chemical formula of cocaine is

Solution:
QUESTION: 157

Melanin protects us from

Solution:
QUESTION: 158

The common pinworm of man, Enterobius vermicularis,is found in

Solution:
QUESTION: 159

Increase in the concentration of pollutants in higher trophic levels is called

Solution:
QUESTION: 160

Lignin occurs in

Solution:
QUESTION: 161

Given below are assertion and reason. Point out if both true with reason being correct explanation

Assertion. Collenchyma is thick walled tissue.
Reason Collenchyma is thickened due to deposition of pectin.

Solution:
QUESTION: 162

Certain chemicals and pharmaceuticals which are very difficult to synthesises by standard methods of biochemistry can now be synthesised by microbes in a culture medium. Some examples of these are

Solution:
QUESTION: 163

Which can counteract biotic potential?

Solution:
QUESTION: 164

The sum total of the populations of the same kind of organisms constitute

Solution:
QUESTION: 165

Air pollution effects are usually found on

Solution:
QUESTION: 166

Formation of an organism from a single, male gamete without fusion with egg is an example of

Solution:
QUESTION: 167

The germination of seeds within the fruit is termed as

Solution:
QUESTION: 168

Which of the following is an storing protein ?

Solution:
QUESTION: 169

Ornethophily refers to

Solution:
QUESTION: 170

Positive feedback controls the secretion of which of the following hormones?

Solution:
QUESTION: 171

Sporopollenin occurs in

Solution:
QUESTION: 172

Spermatogenesis occurs in the

Solution:
QUESTION: 173

Menstruation is triggered by an abrupt decline in the amount of

Solution:
QUESTION: 174

The part of the sperm that contains hydrolytic enzymes is the

Solution:
QUESTION: 175

Which of the following families belong to inferae under Gamopetalae in Bentham and Hooker's system of classification -

Solution:
QUESTION: 176

Antidiuretic hormone (ADH) has an effect on the

Solution:
QUESTION: 177

An alkaloid Atropine uses for dilation of pupil is obtained from-

Solution:
QUESTION: 178

Which of the following occurs in the distal tubule to return acidic blood back to a normal pH?

Solution:
QUESTION: 179

The excretory system regulates the amount of bicarbonate ion (HCO3) in the blood in order to maintain homeostatic levels of

Solution:
QUESTION: 180

Which of the following would increase as ADH levels rise?

Solution: