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NEET Practice Test - 16 - NEET MCQ


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180 Questions MCQ Test NEET Mock Test Series 2025 - NEET Practice Test - 16

NEET Practice Test - 16 for NEET 2024 is part of NEET Mock Test Series 2025 preparation. The NEET Practice Test - 16 questions and answers have been prepared according to the NEET exam syllabus.The NEET Practice Test - 16 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NEET Practice Test - 16 below.
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NEET Practice Test - 16 - Question 1

The enolic form of a acetone contains

Detailed Solution for NEET Practice Test - 16 - Question 1

has 9σ,1π and 2 lone pairs.

NEET Practice Test - 16 - Question 2

What is Z in the following sequence of reactions?

Detailed Solution for NEET Practice Test - 16 - Question 2
Reagents used in the various steps indicate that the compound Z has an alcoholic group. This set of reactions is possible only when Z is CH3CHOHCH3.

In options a and c, Y cannot be converted back into d by the given series of reactions.

NEET Practice Test - 16 - Question 3

An example of electrophilic substitution reaction is :

Detailed Solution for NEET Practice Test - 16 - Question 3
Chlorination of methane proceeds via free radical mechanism. Conversion of methyl chloride to methyl alcohol proceeds via nucleophilic substitution. Formation of ethylene from ethyl alcohol proceeds via dehydration reaction. Nitration of benzene is electrophilic substitution reaction.
NEET Practice Test - 16 - Question 4

Ozone hole refers to:

Detailed Solution for NEET Practice Test - 16 - Question 4
Ozone hole is reduction in thickness of ozone layer in stratosphere.
NEET Practice Test - 16 - Question 5

Match the columns

Detailed Solution for NEET Practice Test - 16 - Question 5
Alkyl iodides are often prepared by the reaction of alkyl chlorides/bromides with Nal in dry acetone. This reaction is known as Finkelstein reaction.

NaCl or NaBr thus formed is precipitated in dry acetone. It facilitates the forward reaction according to Le Chatelier’s principle. The synthesis of alkyl fluorides is best accomplished by heating an alkyl chloride/bromide in the presence of a metallic fluoride such as AgF, Hg2F2, CoF2 or SbF3. The reaction is termed as Swarts reaction.

H3C - Br + AgF → H3C - F + AgBr

NEET Practice Test - 16 - Question 6

In an adiabatic process, no transfer of heat takes place between system and surroundings.

Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following.

Detailed Solution for NEET Practice Test - 16 - Question 6
Justification: free expansion w = 0

adiabatic process q = 0

ΔU = q + w = 0, this means that internal energy remains constant. Therefore,

ΔT = G.

NEET Practice Test - 16 - Question 7

Which is not the disproportionation reaction ?

Detailed Solution for NEET Practice Test - 16 - Question 7
In NH4NO3, there are two different N-atoms (NH+4, NO-3) with different oxidation numbers, thus reaction is not disproportionation.
NEET Practice Test - 16 - Question 8

The correct order of solubility in water for He, Ne, Ar, Kr, Xe is

Detailed Solution for NEET Practice Test - 16 - Question 8
As the molecular weight of noble gas atoms increases down the group its polarity increases due to which van- der-waal’s force between them increases. Due to increased polarity of heavier inert gas, its solubility in water also increases. So, m ost soluble gas will be Xe and least soluble will be He.

So correct order is Xe > Kr > Ar > Ne > He

NEET Practice Test - 16 - Question 9

When dihydroxyacetone reacts with HIO4, the product is/are :

Detailed Solution for NEET Practice Test - 16 - Question 9

NEET Practice Test - 16 - Question 10

Which of the following possesses a sp-carbon in its structure ?

Detailed Solution for NEET Practice Test - 16 - Question 10

NEET Practice Test - 16 - Question 11

Sucrose in water is dextro-rotatory, [α]D= + 66.4º.

When boiled with dilute HCl, the solution becomes leavo-rotatory, [α]D = –20º. In this process the sucrose molecule breaks into

Detailed Solution for NEET Practice Test - 16 - Question 11
The hydrolysis of sucrose by boiling with mineral acid or by enzyme invertase or sucrase produces a mixture of equal molecules of D (+)-glucose and D (-) -Fructose.

NEET Practice Test - 16 - Question 12

Which of the following statement is not true about secondary structure of protein ?

Detailed Solution for NEET Practice Test - 16 - Question 12
The hydrophilic/ hydrophobic character of amino acid residues is important to tertiary structure of protein rather than to secondary structure. In secondary structure, it is the sterie size of the residues that is important and residues are positioned to minimise interactions between each other and the peptide chain.
NEET Practice Test - 16 - Question 13

The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence:

Detailed Solution for NEET Practice Test - 16 - Question 13
p-p overlap between B and F is maximum due to identical size and energy of p- orbitals, so electron deficiency in boron of BF3 is neutralized partially to the maximum extent by back donation.

Hence BF3 is least acidic.

NEET Practice Test - 16 - Question 14

Which of the following is correct order of acidity?

NEET Practice Test - 16 - Question 15

Which of the following reactions can produce aniline as main product?

Detailed Solution for NEET Practice Test - 16 - Question 15
Various products are formed when nitroarenes are reduced. These are given below for C6H5NO2.

Thus, Aniline will be main product in case of (d).

NEET Practice Test - 16 - Question 16

The unit of equivalent conductivity is

Detailed Solution for NEET Practice Test - 16 - Question 16
The equivalent conductivity of a solution,

Where,

K = specific conductance = Unit ohm-1 cm-1

C = normality of the solution unit g eq/cm3

Hence, the unit of ∧eq is Ohm-1.cm2 (gm equivalent)-1.

NEET Practice Test - 16 - Question 17

Tertiary nitro compounds do not tautomerise because

NEET Practice Test - 16 - Question 18

Which of the following liberates O2 upon hydrolysis?

Detailed Solution for NEET Practice Test - 16 - Question 18

(a) Pb3O4 is insoluble in water or do not react with water.

(b) 2KO2 + 2H2O → 2KOH + H2O2 + O2

(c) Na2O2 + 2H2O → 2NaOH + H2O2

(d) Li2O2 + 2H2O → 2 LiOH + H2O2

NEET Practice Test - 16 - Question 19

Following reaction occurrs in an automobile

2C8H18 (g) + 25O2 (g) → 16CO2 (g) + 18H2O (g)

The sign of ΔH,ΔS and ΔG would be

Detailed Solution for NEET Practice Test - 16 - Question 19
For combustion reaction, ΔH is negative, Δn = (16 + 18) - (25 + 2) = +7, so ΔS is + ve, reaction is spontaneous, hence ΔG is -ve.
NEET Practice Test - 16 - Question 20

Complexes formed in the following methods are

I. Mond's process for purification of nickel.

II. Removal of lead poisoning from the body.

III. Cyanide process for extraction of silver.

IV. Froth flotation process for separation of ZnS from galena ore by using depressant.

NEET Practice Test - 16 - Question 21

Structurally biodegradable detergents, should contain

Detailed Solution for NEET Practice Test - 16 - Question 21
Structurally, biodegradable detergents should contain branched alkyl chain.
NEET Practice Test - 16 - Question 22

Which of the following does not represent the correct order of the properties indicated?

Detailed Solution for NEET Practice Test - 16 - Question 22

In a period on moving left to right ionic radii decreases.

NEET Practice Test - 16 - Question 23

The electrons, identified by quantum numbers n and l

(i) n = 4, l = 1

(ii) n = 4, l = 0

(iii) n = 3, l = 2

(iv) n = 3, l = 1

can be placed in order of increasing energy, from the lowest to highest, as

Detailed Solution for NEET Practice Test - 16 - Question 23
According to the (n + 1) rule the higher the value of (n +1), the higher is the energy. When (n +1) value is the same see value of n.

NEET Practice Test - 16 - Question 24

In which of the following cases, the stability of two oxidation states is correctly represented

Detailed Solution for NEET Practice Test - 16 - Question 24
Mn2+ (3d5) is more stable than Mn3+ (3d4).
NEET Practice Test - 16 - Question 25

The major organic product in the reaction,

CH3 — O — CH(CH3)2 + HI → Product is

Detailed Solution for NEET Practice Test - 16 - Question 25
In case of unsymmetrical ethers, the site of cleavage depends on the nature of alkyl group e.g.,

NEET Practice Test - 16 - Question 26

The correct IUPAC name for

NEET Practice Test - 16 - Question 27

A certain compound (X) when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution, the precipitate turns white. The compound is

Detailed Solution for NEET Practice Test - 16 - Question 27
KI reacts with CuSO4 solution to produce cuprous iodide (white precipitate) and I2 (which gives brown colour) Iodine reacts with hypo (Na2S2O35H2O) solution. Decolourisation of solution shows the appearance of white precipitate.

NEET Practice Test - 16 - Question 28

Which one of the following complexes will have four different isomers ?

NEET Practice Test - 16 - Question 29

Select correct statement(s).

Detailed Solution for NEET Practice Test - 16 - Question 29
In CO2 we have 22 (6 + 8 + 8 = 22) electrons. In (CN22-), we have 22 (6 + 7 + 7 + 2 = 22) electrons. Both CO2 and (CN22-) have linear structures. Thus, statement (a) is correct.

i.e., statement (b) is also correct.

The structure of CaC2 is of NaCl type

i.e., statement (c) is also correct.

NEET Practice Test - 16 - Question 30

Which of the following statements is not true ?

Detailed Solution for NEET Practice Test - 16 - Question 30
NO2 is paramagnetic and readily dimerises to N2O4 which is diamagnetic.
NEET Practice Test - 16 - Question 31

If ‘a’ stands for the edge length of the cubic systems : simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively,

Detailed Solution for NEET Practice Test - 16 - Question 31
Following generalization can be easily derived for various types of lattice arrangements in cubic cells between the edge length (a) of the cell and r the radius of the sphere.

For simple cubic: a = 2r or r = a/2

For body centred cubic :

For face centred cubic :

Thus the ratio of radii of spheres for these will be simple : bcc : fee

i.e. option (a) is correct answer.

NEET Practice Test - 16 - Question 32

Penicillin is :

Detailed Solution for NEET Practice Test - 16 - Question 32
Penicillin is an antibiotic which was first obtained from a fungus, penicillium notatum by the scientist, Flemming.
NEET Practice Test - 16 - Question 33

Which does not exist ?

Detailed Solution for NEET Practice Test - 16 - Question 33
Carbon cannot expand its coordination number beyond four due to the absence of d-orbitals, hence it cannot form [CCl6]2- ion.
NEET Practice Test - 16 - Question 34

Perlon is :

Detailed Solution for NEET Practice Test - 16 - Question 34
Nylon-6 is also called as perlon. It is a polymer of caprolactam.

NEET Practice Test - 16 - Question 35

Complex X of composition Cr(H2O)6Cln has a spin only magnetic moment of 3.83 BM. It reacts with AgNO3 and shows geometrical isomerism.

The IUPAC nomenclature of X is:

Detailed Solution for NEET Practice Test - 16 - Question 35

n - 3 ( n = No. of unpaired e-)

Therefore, oxidation number of Cr should be +3.

Hence complex is Cr(H2O)6Cl3.

Complex shows geometrical isomerism therefore formula of complex is [Cr(H2O)4Cl2]Cl.2H2O.

IUPACName: Tetraaquadichlorido chromium(III) Chloride dihydrate

NEET Practice Test - 16 - Question 36

The observed osmotic pressure for a 0.10 M solution of Fe(NH4)2(SO4)2 at 25°C is 10.8 atm.

The expected and experimental (observed) values of van’t Hoff factor (i) will be respectively: (R = 0.082 L atm K–1 mol–1)

Detailed Solution for NEET Practice Test - 16 - Question 36
Given πob = 10.8 atm

πnor = CST = 0.10 x 0.0821 x 298 = 2.446

Now experimental value of (i)

NEET Practice Test - 16 - Question 37

Arrange the following in increasing order of their acidity?

(a) o–cresol,

(b) salicylic acid,

(c) phenol

Detailed Solution for NEET Practice Test - 16 - Question 37

Electron releasing groups (-CH3, -OCH3, -NCH3 etc) intensify the negative charge of phenoxide ion, i.e., destablises it hence decrease ionization of parent phenol. Therefore decreases acidity while electron donating groups (-NO2, -COOH, - CHO etc.) increases acidity.

NEET Practice Test - 16 - Question 38

The average molecular speed is greatest in which of the following gas samples ?

Detailed Solution for NEET Practice Test - 16 - Question 38
Average molecular speed is dependent on T and M. Thus, greater the value of greater the molecular speed.

NEET Practice Test - 16 - Question 39

A molecule M associates in a given solvent according to the equation M ⇌ (M)n. For a certain concentration of M, the van't Hoff factor was found to be 0.9 and the fraction of associated molecules was 0.2. The value of n is:

Detailed Solution for NEET Practice Test - 16 - Question 39
van’t Hoff factor (i) and the degree of association are related as below

NEET Practice Test - 16 - Question 40

The restricted rotation about carbon carbon double bond in 2-butene is due to :

Detailed Solution for NEET Practice Test - 16 - Question 40
Rotation around π bond is not possible. If any attempt is made to rotate one of the carbon atoms, the lobes of π-orbital will no longer remain coplanar i.e no parallel overlap will be possible and thus π-bond will break. This is known as concept of restricted rotation. In other words the presence of π-bonds makes the position of two carbon atom.
NEET Practice Test - 16 - Question 41

Specific volume of cylindrical virus particle is 6.02 × 10–2 cc/gm. whose radius and length 7 Å & 10 Å respectively. If NA = 6.02 × 1023 mol–1, find molecular weight of virus

Detailed Solution for NEET Practice Test - 16 - Question 41
Specific volume (volume of 1 gm) of cylindrical virus particle = 6.02 x 10-2cc/gm

Radius of virus (r) = 7 Å = 7 x 10-8 cm

Length of virus = 10 x 10-8 cm

Volume of virus

Wt. of one virus particle = volume/specific volume

∴ Mol. wt. of virus = Wt. of NA particle

= 15400 g/mol = 15.4 kg/mole

NEET Practice Test - 16 - Question 42

Arrange the following phenols in order of their increasing acidity.

Detailed Solution for NEET Practice Test - 16 - Question 42
Observe the relative stability of their corresponding conjugate bases.

However, the acidity of the corresponding phenols will be different because of H-bonding in the ortho isomer.

NEET Practice Test - 16 - Question 43

The volume-temperature graphs of a given mass of an ideal gas at constant pressure are shown below.

What is the correct order of pressures ?

Detailed Solution for NEET Practice Test - 16 - Question 43
From the graph we can see the correct order of pressures P1 > p3 > p2
NEET Practice Test - 16 - Question 44

Which of the following compound will undergo self aldol condensation in the presence of cold dilute alkali ?

Detailed Solution for NEET Practice Test - 16 - Question 44
A ldehydes which contain a α -hydrogen on a saturated carbon, i.e., CH3CH2CHO undergo aldol condensation.

NEET Practice Test - 16 - Question 45

Cyclic hydrocarbon ‘A’ has all the carbon and hydrogen atoms in a single plane. All the carbon carbon bonds have the same length, less than 1.54 Å, but more than 1.34 Å. The C – C – C bond angle will be

NEET Practice Test - 16 - Question 46

Two rods A and B of identical dimensions are at temperature 30°C. If A is heated upto 180°C and B up to T°C, then the new lengths are the same.

If the ratio of the coefficients of linear expansion of A and B is 4 : 3, then the value of T is :

Detailed Solution for NEET Practice Test - 16 - Question 46
Δl1 = Δl2

​lα1 ΔT−1 = lα2 ΔT2

T = 230°C

NEET Practice Test - 16 - Question 47

If electronic charge e, electron mass m, speed of light in vacuum c and Planck’s constant h are taken as fundamental quantities, the permeability of vacuum μ0 can be expressed in units of

Detailed Solution for NEET Practice Test - 16 - Question 47
Let μ0 related with e, m, c and h as follows.

μ0 = keambcchd

[MLT-2A-2] = [AT]a [M]b [LT-1]c [ML2T-1]d

= [Mb + d Lc + 2d Ta - c - d Aa]

On comparing both sides we get

a = - 2 ...(i)

b + d = 1 ...(ii)

c + 2d = 1 ...(iii)

a - c - d = -2 ~(iv)

By equation (i), (ii), (iii) & (iv) we get,

a = - 2, b = 0, c = - 1, d = 1

NEET Practice Test - 16 - Question 48

In order to make the effective acceleration due to gravity equal to zero at the equator, the angular velocity of rotation of the earth about its axis should be (g = 10 ms–2 and radius of earth is 64000 km)

Detailed Solution for NEET Practice Test - 16 - Question 48
g' = g - ω2 R cos2 λ

To make effective acceleration due to gravity zero at equator

λ = 0 and g' = 0

∴ 0 = g - ω2R ⇒ ω

NEET Practice Test - 16 - Question 49

Let np and ne be the number of holes and conduction electrons in an intrinsic semiconductor. Then

Detailed Solution for NEET Practice Test - 16 - Question 49
In intrinsic semi conductor, the number of holes are equal to number of electrons i.e., np = ne
NEET Practice Test - 16 - Question 50

The graph of an object’s motion (along the x-axis) is shown in the figure. The instantaneous velocity of the object at points A and B are vA and vB respectively. Then

Detailed Solution for NEET Practice Test - 16 - Question 50
Instantaneous velocity v = Δx/Δt

i.e., vA = vB = 0.5m /s

NEET Practice Test - 16 - Question 51

If the number of turns per unit length of a coil of a solenoid is doubled, the self inductance of the solenoid will

Detailed Solution for NEET Practice Test - 16 - Question 51
L α n2, where n is number of turn per unit length,
NEET Practice Test - 16 - Question 52

A gun is aimed at a horizontal target. It takes 1/2 s for the bullet to reach the target. The bullet hits the target x metre below the aim. Then, x is equal to

Detailed Solution for NEET Practice Test - 16 - Question 52

NEET Practice Test - 16 - Question 53

If microwaves, X rays, infrared, gamma rays, ultra-violet, radio waves and visible parts of the electromagnetic spectrum are denoted by M, X, I, G, U, R and V then which of the following is the arrangement in ascending order of wavelength ?

Detailed Solution for NEET Practice Test - 16 - Question 53
Gamma rays < X-rays < Ultra violet < Visible rays < Infrared rays < Microwaves < Radio waves.
NEET Practice Test - 16 - Question 54

A letter 'A' is constructed of a uniform wire with resistance 1.0 Ω per cm, The sides of the letter are 20 cm and the cross piece in the middle is 10 cm long. The apex angle is 60 . The resistance between the ends of the legs is close to:

NEET Practice Test - 16 - Question 55

A steel rod of radius R = 10 mm and length L= 100 cm is stretched along its length by a force F = 6.28 × 104 N. If the Young’s modulus of steel is Y = 2 ×1011 N/m2, the percentage elongation in the length of the rod is

Detailed Solution for NEET Practice Test - 16 - Question 55
Δℓ = Fℓ/AY

NEET Practice Test - 16 - Question 56

Out of the following which one is not a possible energy for a photon to be emitted by hydrogen atom according to Bohr’s atomic model?

Detailed Solution for NEET Practice Test - 16 - Question 56
Obviously, difference of 11.1 eV is not possible.

NEET Practice Test - 16 - Question 57

A projectile is fired from the surface of the earth with a velocity of 5 ms–1 and angle θ with the horizontal. Another projectile fired from another planet with a velocity of 3 ms–1 at the same angle follows a trajectory which is identical with the trajectory of the projectile fired from the earth.

The value of the acceleration due to gravity on the planet is (in ms–2) given g = 9.8 m/s2

Detailed Solution for NEET Practice Test - 16 - Question 57

Therefore

NEET Practice Test - 16 - Question 58

Potentiometer measures potential more accurately because

NEET Practice Test - 16 - Question 59

A mass of 1 kg is suspended by a thread. It is

(i) lifted with an acceleration 4.9 m/s2

(ii) lowered with an acceleration 4.9 m/s2.

The ratio of the tension is

Detailed Solution for NEET Practice Test - 16 - Question 59
T1 = m(g + a) ; T2 = m (g - a) ⇒ T1/T2 = 3:1
NEET Practice Test - 16 - Question 60

If the momentum of a particle is doubled, then its de-Broglie wavelength will become

Detailed Solution for NEET Practice Test - 16 - Question 60
For de-Broglie wavelength, λ = h/mv

So, if mv is doubled, value of λ will be halved.

NEET Practice Test - 16 - Question 61

A Carnot engine is working between 127°C and 27°C. The increase in efficiency will be maximum when the temperature of

Detailed Solution for NEET Practice Test - 16 - Question 61
is maximum in case (b).
NEET Practice Test - 16 - Question 62

The magnitude of the average electric field normally present in the atmosphere just above the surface of the Earth is about 150 N/C, directed inward towards the center of the Earth. This gives the total net surface charge carried by the Earth to be:

[Given εo = 8.85 × 10–12 C2/N-m2, RE = 6.37 × 106 m]

Detailed Solution for NEET Practice Test - 16 - Question 62
Given, Electric field E = 150N/C

Total surface charge carried by earth q = ?

or, q = ∈0 E A

= ∈0 E πr2.

= 8.85 x 10-12 x 150 x (6.37 x 106)2.

= 680 KC

As electric field directed inward hence

q = -680kC

NEET Practice Test - 16 - Question 63

The tuning circuit of a radio receiver has a resistance of 50 Ω, an inductance of 10 mH and a variable capacitance C. A 1 MHz radio wave produces a potential difference of 0.1 mV. The value of capacitance to produce the resonance will be

Detailed Solution for NEET Practice Test - 16 - Question 63
The resonant frequency

NEET Practice Test - 16 - Question 64

A cubical block of side 0.5 m floats on water with 30% of its volume under water. What is the maximum weight that can be put on the block without fully submerging it under water?

[Take, density of water = 103 kg/m3]

Detailed Solution for NEET Practice Test - 16 - Question 64
M = ρL [0.5 × 0.5 × 0.35]

= 103 [0.0875]

M = 87.5kg

NEET Practice Test - 16 - Question 65

Two waves whose intensities are 9 and 16 are made to interfere. The ratio of maximum and minimum intensities in the interference pattern is

NEET Practice Test - 16 - Question 66

Energy of simple harmonic motion depends upon [Here, a = amplitude, ω = angular velocity]

Detailed Solution for NEET Practice Test - 16 - Question 66
Energy of simple harmonic motion ∝ a2
NEET Practice Test - 16 - Question 67

Two deuterons undergo nuclear fusion to form a Helium nucleus. Energy released in this process is : (given binding energy per nucleon for deuteron = 1.1 MeV and for helium = 7.0 MeV)

Detailed Solution for NEET Practice Test - 16 - Question 67
1H2 + 1H22He4

Total binding energy of two deuterium nuclei = 1.1 x 4 = 4.4 MeV

Binding energy of a (2He4) nuclei

= 4 x 7 = 28 MeV

Energy released in this process

= 28-4.4 = 23.6 MeV

NEET Practice Test - 16 - Question 68

When the amount of work done is 300 J and change in internal energy is 100 J, then the heat supplied is

Detailed Solution for NEET Practice Test - 16 - Question 68
ΔQ= ΔE + ΔW = 100 + 300 = 400 J
NEET Practice Test - 16 - Question 69

A bar magnet of length 6 cm has a magnetic moment of 4 J T–1. Find the strength of magnetic field at a distance of 200 cm from the centre of the magnet along its equatorial line.

Detailed Solution for NEET Practice Test - 16 - Question 69
Along the equatorial line, magnetic field strength

Solving we get, B = 5 × 10–8 tesla

NEET Practice Test - 16 - Question 70

Three infinitely long charge sheets are placed as shown in figure. The electric field at point P is

NEET Practice Test - 16 - Question 71