NEET Exam  >  NEET Tests  >  NEET Mock Test Series 2025  >  NEET Practice Test - 25 - NEET MCQ

NEET Practice Test - 25 - NEET MCQ


Test Description

180 Questions MCQ Test NEET Mock Test Series 2025 - NEET Practice Test - 25

NEET Practice Test - 25 for NEET 2024 is part of NEET Mock Test Series 2025 preparation. The NEET Practice Test - 25 questions and answers have been prepared according to the NEET exam syllabus.The NEET Practice Test - 25 MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for NEET Practice Test - 25 below.
Solutions of NEET Practice Test - 25 questions in English are available as part of our NEET Mock Test Series 2025 for NEET & NEET Practice Test - 25 solutions in Hindi for NEET Mock Test Series 2025 course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt NEET Practice Test - 25 | 180 questions in 200 minutes | Mock test for NEET preparation | Free important questions MCQ to study NEET Mock Test Series 2025 for NEET Exam | Download free PDF with solutions
1 Crore+ students have signed up on EduRev. Have you? Download the App
NEET Practice Test - 25 - Question 1

The number of antibonding electron pairs inO2-2 molecular ions on the basis of molecular orbital theory are (at. no. O = 8)

Detailed Solution for NEET Practice Test - 25 - Question 1
O2-2 = 18e-

NEET Practice Test - 25 - Question 2

The transition metals have a less tendency to form ions due to:

Detailed Solution for NEET Practice Test - 25 - Question 2
All statements are correct.
NEET Practice Test - 25 - Question 3

Brine is electrolysed by using inert electrodes.

The reaction at anode is ________.

NEET Practice Test - 25 - Question 4

Schotten-Baumann reaction is a reaction of phenols with:

NEET Practice Test - 25 - Question 5

According to the adsorption theory of catalysis, the speed of the reaction increases because

Detailed Solution for NEET Practice Test - 25 - Question 5
Adsorption lowers the activation energy.
NEET Practice Test - 25 - Question 6

Consider the following complex [Co(NH3)5CO3]ClO4.The coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons on the metal are respectively

Detailed Solution for NEET Practice Test - 25 - Question 6
[Co(NH3)JCO3]CIO4 Six monodentate ligands are attached to Co hence C. N. of Co = 6;

O. N. = x + 5 x (0) +1 x (-2) +1 x (-1) = 0

∴ x = + 3 ; electronic configuration of Co3+[Ar] 3d64s0

hence the number of d electrons is 6 : All d electrons are paired due to strong ligands hence unpaired electrons zero.

NEET Practice Test - 25 - Question 7

Match the columns

NEET Practice Test - 25 - Question 8

Teflon, styron and neoprene are all :

NEET Practice Test - 25 - Question 9

The reducing power of divalent species decreases in the order

Detailed Solution for NEET Practice Test - 25 - Question 9
The stability of + 2O .S . follows the order

Pb2+ > Sn2+ > Ge2+

Hence reducing power Ge > Sn > Pb

NEET Practice Test - 25 - Question 10

Prevention of corrosion of iron by Zn coating is called:

Detailed Solution for NEET Practice Test - 25 - Question 10
Galvanization
NEET Practice Test - 25 - Question 11

RNA is different from DNA because RNA contains

NEET Practice Test - 25 - Question 12

Beryllium shows a diagonal relationship with aluminium. Which of the following similarity is incorrect :

Detailed Solution for NEET Practice Test - 25 - Question 12
The Be (OH)2 and Al (OH)3 are amphoteric in nature.
NEET Practice Test - 25 - Question 13

The fatty acid which shows reducing property is

Detailed Solution for NEET Practice Test - 25 - Question 13
Formic acid has aldehyde grouping

NEET Practice Test - 25 - Question 14

When cyclohexane is poured on water, it floats, because

NEET Practice Test - 25 - Question 15

(n – 1)d10 ns2 is the general electronic configuration of

NEET Practice Test - 25 - Question 16

Structurally biodegradable detergent should contain

Detailed Solution for NEET Practice Test - 25 - Question 16
Linear alkylbenzene sulphonates (LAB) carrying phenyl chains at secondary positions are biodegradable.
NEET Practice Test - 25 - Question 17

Which of the following crystals does not exhibit Frenkel defect?

Detailed Solution for NEET Practice Test - 25 - Question 17
KBr does not exhibit Frenkel defects.
NEET Practice Test - 25 - Question 18

Which of the following statements about low density polythene is FALSE?

Detailed Solution for NEET Practice Test - 25 - Question 18
High density polythene is used in the manufacture of housewares like buckets, dustbins, bottles, pipes etc. Low density polythene is used for insulating electric wires and in the manufacture of flexible pipes, toys, coats, bottles etc.
NEET Practice Test - 25 - Question 19

Consider the following reaction :

(i) Rate of reaction with respect to NH 3 will be

(ii) For the given reaction

(iii) For the given reaction

(iv) For the given reaction, =

Which of the following are the correct statements.

Detailed Solution for NEET Practice Test - 25 - Question 19
For the given reaction

=

NEET Practice Test - 25 - Question 20

The important antioxidant used in food is:

Detailed Solution for NEET Practice Test - 25 - Question 20
BHT is the important antioxidant used in food.
NEET Practice Test - 25 - Question 21

Geometrical isomerism is not shown by

Detailed Solution for NEET Practice Test - 25 - Question 21
The condition for geometrical isomerism is

NEET Practice Test - 25 - Question 22

Which of the following statements are correct ?

(i) Ionic product of water (Kw) = [H+] [OH] = 10–14M2

(ii) At 298K [H+] = [OH] = 10–7

(iii) Kw does not depends upon temperature

(iv) Molarity of pure water = 55.55M

Detailed Solution for NEET Practice Test - 25 - Question 22
Kw depends upon temperature as it is an equilibrium constant.
NEET Practice Test - 25 - Question 23

Consider the following reaction at 1000°C

A.

B.

Choose the correct statement at 1000°C

NEET Practice Test - 25 - Question 24

Match List I (Reaction) with List II (Reagent) and select the correct answer using the codes given below the lists:

NEET Practice Test - 25 - Question 25

Which one of t h e following is the correct statement?

Detailed Solution for NEET Practice Test - 25 - Question 25
The correct formula of inorganic benzene i s B3N3H6 so (a) is an incorrect statement.

Boric acid is a lewis acid so (b) is an incorrect statement.

The coordination number exhibited by beryllium is 4 and not 6 so statement (c) is incorrect.

Both BeCl2 and AlCl3 exhibit bridged structures in solid state so (d) is the correct statement.

NEET Practice Test - 25 - Question 26

Values of dissociation constant, Ka are given as follows :

Correct order of increasing base strength of the base CN, F and NO2- will be :

Detailed Solution for NEET Practice Test - 25 - Question 26
Higher the value of Ka lower will be the value of pKa i.e. higher will be the acidic nature. Further since CN-, F- and NO2- are conjugate base of the acids HCN, HF and HNO2 respectively hence the correct order of base strength will be

F- < NO2-< CN-

( stronger the acid weaker will be its conjugate base)

NEET Practice Test - 25 - Question 27

Which of the following statements is not correct regarding aniline?

Detailed Solution for NEET Practice Test - 25 - Question 27
Aniline is insoluble in water, because its -NH2 group can’t form H- bond with water due to the bulky phenyl group.
NEET Practice Test - 25 - Question 28

Aromatic character of benzene is proved by:

NEET Practice Test - 25 - Question 29

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approximately

Detailed Solution for NEET Practice Test - 25 - Question 29

= 1.1 x 10-33m

NEET Practice Test - 25 - Question 30

What are these

and are

Detailed Solution for NEET Practice Test - 25 - Question 30
The two structures involve only movement of electrons and not of atoms or groups, hence these are resonating structures.
NEET Practice Test - 25 - Question 31

For orthorhombic system axial ratios are a ≠ b ≠ c and the axial angles are

Detailed Solution for NEET Practice Test - 25 - Question 31
For orthorhombic α = β = ү = 90°
NEET Practice Test - 25 - Question 32

If a person is suffering from the deficiency of nor-adrenaline, what kind of drug can be suggested?

Detailed Solution for NEET Practice Test - 25 - Question 32
If the level of noradrenaline is low, then the person suffers from depression. In such situations, antidepressant drugs are required.
NEET Practice Test - 25 - Question 33

Which is colourless in water?

Detailed Solution for NEET Practice Test - 25 - Question 33
Since Sc3+ does not contain any unpaired electron it is colourless in water.
NEET Practice Test - 25 - Question 34

The correct match between Item-I and Item - II is:

Detailed Solution for NEET Practice Test - 25 - Question 34

(A) Natural rubber - Polymer of isoprene

(B) Neoprene - Polymer of chloroprene

(C) Buna N - Polymer of 1,3 -butadiene and acrylonitrile

(D) Buna S - Polymer of 1,3-butadiene and styrene

NEET Practice Test - 25 - Question 35

Which pair of elements belongs to the same group?

Detailed Solution for NEET Practice Test - 25 - Question 35
Atomic no. 17 (Cl) and 53 (I) are present in the same group
NEET Practice Test - 25 - Question 36

Select the correct statement based on the above scheme.

Detailed Solution for NEET Practice Test - 25 - Question 36
Zinc and lead in molten state are immiscible and form separate layers, further Zn, being lighter, forms the upper layer. Silver is soluble in both Zn and Fb, and hence all statements are correct.
NEET Practice Test - 25 - Question 37

Which of the following is not correct?

Detailed Solution for NEET Practice Test - 25 - Question 37
The correct reaction is

NEET Practice Test - 25 - Question 38

In the form of dichromate, Cr (VI) is a strong oxidising agent in acidic medium but Mo (VI) in MoO3 and W (VI) in WO3 are not because________.

(i) Cr (VI) i s more stable than Mo(VI) and W (VI).

(ii) Mo (VI) and W(VI) are more stable than Cr(VI).

(iii) Higher oxidation states of heavier members of group-6 of transition series are more stable.

(iv) Lower oxidation states of heavier members of group-6 of transition series are more stable.

NEET Practice Test - 25 - Question 39

At a particular temperature, the vapour pressures of two liquids A and B are respectively 120 and 180 mm of mercury. If 2 moles of A and 3 moles of B are mixed to form an ideal solution, the vapour pressure of the solution at the same temperature will be (in mm of mercury)

Detailed Solution for NEET Practice Test - 25 - Question 39
Vapour pressure of solution

= PA+ PB = PAoxA + PBoxB

=

= 156 mm

NEET Practice Test - 25 - Question 40

The packing efficiency of the two-dimensional square unit cell shown below is :

Detailed Solution for NEET Practice Test - 25 - Question 40
Packing efficiency = Area occupied by effective circles / Area of square

=

= π / 4 x 100

= 78.54%

NEET Practice Test - 25 - Question 41

On increasing the pressure, the gas phase reaction proceeds forward to re-establish equilibrium, as predicted by applying the LeChatelier’s principle. Consider the reaction.

Which of the following is correct, if the total pressure at which the equilibrium is established, is increased without changing the temperature?

Detailed Solution for NEET Practice Test - 25 - Question 41
Justification: According to Le-Chatelier’s principle, at constant temperature, the equilibrium composition will change but K will remain the same.
NEET Practice Test - 25 - Question 42

Among the statements (I - IV), the correct ones are :

(I) Be has a smaller atomic radius compared to Mg.

(II) Be has higher ionization enthalpy than Al.

(III) Charge/radius ratio of Be is greater than that of Al.

IV) Both Be and Al form mainly covalent compounds.

Detailed Solution for NEET Practice Test - 25 - Question 42
Charge/ radius ratio of Be and Al is same because of diagonal relationship. Remaining statements are correct.
NEET Practice Test - 25 - Question 43

For one mole of an ideal gas, which of these statements must be true?

(1) U and H each depends only on temperature

(2) Compressibility factor z is not equal to 1

(3) CP, m – CV, m = R (4) dU = CVdT for any process

NEET Practice Test - 25 - Question 44

Among the following, the species having square planar geometry for central atom are

(i) XeF4

(ii) SF4

(iii) [NiCl4]2–

(iv) [PtCl4]2–

Detailed Solution for NEET Practice Test - 25 - Question 44
Square Planar Structure: XeF4 and [PtCl4]2-
NEET Practice Test - 25 - Question 45

Consider the following fcc unit cells choose the correct option

resent octahedral holes

Detailed Solution for NEET Practice Test - 25 - Question 45
Examine the nearest number of neighbours in (I) and (II). The number is six which is octahedral.
NEET Practice Test - 25 - Question 46

A glass flask is filled up to a mark with 50 cc of mercury at 18°C. If the flask and contents are heated to 38°C, how much mercury will be above the mark? (a for glass is 9 × 10 –6/ºC and coefficient of real expansion of mercury is 180 × 10–6/ºC)

Detailed Solution for NEET Practice Test - 25 - Question 46
Due to volume expansion of both mercury and flask, die change in volume of mercury relative to flask is given by

= 50 [180 x 10-6- 3 x 9 x 10-6] (38 -18)

=0.153 cc

NEET Practice Test - 25 - Question 47

A bar magnet of magnetic moment is placed in the magnetic field . The torque acting on the magnet is

Detailed Solution for NEET Practice Test - 25 - Question 47
Torque acting on a magnet when it is rotated by θ° from its equilibrium position is MB sin θ.

which is equivalent to

NEET Practice Test - 25 - Question 48

A simple pendulum is executing simple harmonic motion with a time period T. If the length of the pendulum is increased by 21% then the increase in the time period of the pendulum due to increased length is

Detailed Solution for NEET Practice Test - 25 - Question 48

Length | increases from l to 1.21 l

NEET Practice Test - 25 - Question 49

The K.E. of one mole of an ideal gas is E = (3/2) RT. Then Cp will be

Detailed Solution for NEET Practice Test - 25 - Question 49

= 2.5 R

NEET Practice Test - 25 - Question 50

The condition for obtaining secondary maxima in the diffraction pattern due to single slit is

NEET Practice Test - 25 - Question 51

A wheel with ten metallic spokes each 0.50m long is rotated with a speed of 120 rev/min in a plane normal to the earth’ s magnetic field at the place.

If the magnitude of the field is 0.40 G, the induced emf between the axle and the rim of the wheel is equal to

Detailed Solution for NEET Practice Test - 25 - Question 51

=

= 0.628 x 10-4V.

NEET Practice Test - 25 - Question 52

If the atom 100Fm257 follows the Bohr model and the radius of 100Fm257 is n times the Bohr radius, then find n.

NEET Practice Test - 25 - Question 53

The logic behind ‘NOR’ gate is that it gives

Detailed Solution for NEET Practice Test - 25 - Question 53
In the case of ‘NOR’ logic circuits, when input is 0, the output is 1, that is when both the inputs are low, the output is high.
NEET Practice Test - 25 - Question 54

A, B and C are three points in a uniform electric field. The electric potential is

Detailed Solution for NEET Practice Test - 25 - Question 54
Potential at B, VB is maximum

VB >VC > VA

As in the direction of electric field potential decreases,

NEET Practice Test - 25 - Question 55

Using equipartition of energy, the specific heat (in J kg–1 K–1) of aluminium at room temperature can be estimated to be (atomic weight of aluminium = 27)

Detailed Solution for NEET Practice Test - 25 - Question 55
Using equipartition of energy, we have

C =-

∴ C = 925 J/kgK

NEET Practice Test - 25 - Question 56

The efficiency of an ideal gas with adiabatic exponent 'ү' for the shown cyclic process would be

NEET Practice Test - 25 - Question 57

A block of mass 60 kg just slides over a horizontal distance of 0.9 m. If the coefficient of friction between their surface is 0.15 then work done against friction will be

Detailed Solution for NEET Practice Test - 25 - Question 57
Force of friction acting = µmg = 0.15 x 60 x 9.8N

Distance = 0.9 m

Work done = 0.15 x 60 x 9.8 x 0.9 = 79.4joule

NEET Practice Test - 25 - Question 58

A wheel having moment of inertia 2 kg-m2 about its vertical axis, rotates at the rate of 60 rpm about this axis, The torque which can stop the wheel’s rotation in one minute would be

Detailed Solution for NEET Practice Test - 25 - Question 58
τ x Δt = L0 {since Lf = 0}

τ x Δt = Iω

or τ x 60 = 2 x 2 x 60π/60

NEET Practice Test - 25 - Question 59

Which is true of the following in a purely resistive ac circuit?

Detailed Solution for NEET Practice Test - 25 - Question 59
In an ac circuit, the ac driving voltage v leads the circuit current i through an angle ፀ, given by

⇒ ፀ = 0

NEET Practice Test - 25 - Question 60

A particle executes S.H.M. having time period T. Time period with which the potential energy changes is

Detailed Solution for NEET Practice Test - 25 - Question 60
P.E. changes from zero to maximum twice in each vibration so its time period is T/2.
NEET Practice Test - 25 - Question 61

Hysteresis loops for two magnetic materials A and B are given below :

These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use :

Detailed Solution for NEET Practice Test - 25 - Question 61
Graph [A] is for material used for making permanent magnets (high coercivity) Graph [B] is for making electromagnets and transformers.
NEET Practice Test - 25 - Question 62

The escape velocity for a body projected vertically upwards from the surface of earth is 11 km/s. If the body is projected at an angle of 45º with the vertical, the escape velocity will be

Detailed Solution for NEET Practice Test - 25 - Question 62
Since escape velocity is an independent angle of projection, so it will not change.
NEET Practice Test - 25 - Question 63

An air bubble of radius 1 cm in water has an upward acceleration of 9.8 cm s–2. The density of water is 1 gm cm–3 and water offers negligible drag force on the bubble. The mass of the bubble is (g = 980 cm/s2)

Detailed Solution for NEET Practice Test - 25 - Question 63
Given

Radius of air bubble = 1 cm ,

Upward acceleration of bubble, a = 9.8 cm/s2,

ρwater = 1 gcm-3

Volume V =

Fbuoyant - mg = ma

⇒ m = Fbuoyant / g + a

= 4.15 g

NEET Practice Test - 25 - Question 64

A thin liquid film formed between a U-shaped wire and a light slider supports a weight of 1.5 × 10–2 N (see figure). The length of the slider is 30 cm and its weight is negligible. The surface tension of the liquid film is

Detailed Solution for NEET Practice Test - 25 - Question 64
At equilibrium, weight of the given block is balanced by force due to surface tension, i.e.,

2L. S = W

or S = W / 2L

=

= 0.025 Nm-1

NEET Practice Test - 25 - Question 65

A phase difference between two points separated by 0.8 m in a wave of frequency 120 Hz is π/2.

The wave velocity is

Detailed Solution for NEET Practice Test - 25 - Question 65
Phase difference = 2π / λ x path difference

⇒ λ = 0.8 m x 4 = 3.2 m

velocity = λ x v = 3.2 x 120 = 384 m/s.

NEET Practice Test - 25 - Question 66

A triangular block of mass M with angles 30°, 60° and 90° rest with its 30° – 90° side on a horizontal table. A cubical block of mass m rests on the 60° – 30° side. The acceleration which M must have relative to the table to keep m stationary relative to the triangular block is (assuming frictionless contact)

Detailed Solution for NEET Practice Test - 25 - Question 66

Use result, a = gtan θ, a = gtan 30° = g√3

NEET Practice Test - 25 - Question 67

A network of six identical capacitors, each of capacitance C is made as shown in the figure.

The equivalent capacitance between points A and B is

Detailed Solution for NEET Practice Test - 25 - Question 67

The network is equivalent to Therefore equivalent capacitance

= [2C series C] // [C series 2C]

=

NEET Practice Test - 25 - Question 68

How much energy is required for a body of mass 1000 kg to escape from the earth? (g = 9.8 m/s2, R = 6400 km)

Detailed Solution for NEET Practice Test - 25 - Question 68

= 6.4 x 1010J (approx.)

NEET Practice Test - 25 - Question 69

A spool is pulled horizontally by two equal and opposite forces on a rough surface. The correct statement is :

Detailed Solution for NEET Practice Test - 25 - Question 69
The sliding tendency of the bottom most point of the spool is backward, so friction acts rightwards. Therefore the centre of mass of the spool moves rightwards.
NEET Practice Test - 25 - Question 70

For a given material, the Young’s modulus is 2.4 times that of rigidity modulus, the Poission’s ratio is

Detailed Solution for NEET Practice Test - 25 - Question 70