NEET Practice Test - 1 - NEET MCQ

# NEET Practice Test - 1 - NEET MCQ

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## 180 Questions MCQ Test NEET Mock Test Series 2025 - NEET Practice Test - 1

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

### According to Newton, the viscous force acting between liquid layers of area A and velocity gradient Δv/Δz is given by where η is constant called coefficient of viscosity. The dimensional formula of η is:

Detailed Solution for NEET Practice Test - 1 - Question 1

Substituting the dimensional formula of F, A, ΔV  and  ΔZ on both sides and finding the dimensional formulae for η, we get –

∴ unit of η are –

NEET Practice Test - 1 - Question 2

### The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 20 cm is placed between the convex lens and image at a distance of 26 cm from the convex lens, calculate the new size of the image.

Detailed Solution for NEET Practice Test - 1 - Question 2

Image formed by convex lens at I1 will act at as a virtual object for concave lens. For concave lens

Magnification for concave lens

As size of the image at I1 is 2 cm. Therefore, size of image at I2 will be 2 x 1.25 cm.

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NEET Practice Test - 1 - Question 3

### The potential energy of a particle varies asFor 0≤ x ≤ 1, the de-Broglie wavelength is λ1 and for x > 1 the de-Broglie wavelength is λ2. The total energy of the particle is 2E0. Find λ1/λ2

Detailed Solution for NEET Practice Test - 1 - Question 3

For 0 ≤ x ≤ 1 , U=E0

∴ Kinetic energy, K1 = Total energy - U

=2E0−E0=E0

∴ Kinetic energy K2 = Total energy -U

From Eqs. (i) and (ii), we have

NEET Practice Test - 1 - Question 4

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m s−1. A plumb bob is suspended from the roof of the car by a light rigid rod. The angle made by the rod with the vertical is

(Take g=10 m s−2)

Detailed Solution for NEET Practice Test - 1 - Question 4

and T cosθ=mg

NEET Practice Test - 1 - Question 5

Two metallic wires of the same material have the same length but cross-sectional area is in the ratio 1:2. They are connected (i) in series and (ii) in parallel. Compare the drift velocities of electrons in the two wires in both the cases (i) and (ii).

Detailed Solution for NEET Practice Test - 1 - Question 5

We have given

(i) When two wires are connected in series the current in both wires A and B will be same

(ii) We two wires are connected in parallel, then the potential difference across the wire A and B will be same

NEET Practice Test - 1 - Question 6

Consider a thin spherical shell of radius R with centre at the origin, carrying uniform positive surface charge density. The variation of the magnitude of the electric field and the electric potential V(r) with the distance r from the centre, is best represented by which graph?

Detailed Solution for NEET Practice Test - 1 - Question 6

NEET Practice Test - 1 - Question 7

The time period of an earth satellite in circular orbit is independent of

Detailed Solution for NEET Practice Test - 1 - Question 7

As T2∝r3 and proportionality constant does not depend on the mass of orbiting body. So, answer The mass of the satellite is correct.

NEET Practice Test - 1 - Question 8

A particle is fired with velocity u making angle θ with the horizontal. What is the magnitude of change in velocity when it is at the highest point?

Detailed Solution for NEET Practice Test - 1 - Question 8

Velocity at the highest point,

Velocity at the starting point,

NEET Practice Test - 1 - Question 9

A black body of temperature T is inside a chamber of temperature T0. Now the closed chamber is slightly opened to the sun such that the temperature of black body (T) and chamber (T0) remains constant. Then,

Detailed Solution for NEET Practice Test - 1 - Question 9

Since, the temperature of black body is constant, total heat absorbed = total heat radiated.

NEET Practice Test - 1 - Question 10

A stone tied to a string of length L is whirled in a vertical circle with the other end of the string at the centre. At a certain instant of time, the stone is at its lowest position, and has a speed u. The magnitude of the change in its velocity as it reaches a position, where the string is horizontal, is

Detailed Solution for NEET Practice Test - 1 - Question 10

From energy conservation ν2=u2−2gL ... (i)

Now, since the two velocity vectors shown in figure are mutually perpendicular, hence the magnitude of change of velocity will be given by

Substituting value of ν2 from Eq. (i)

NEET Practice Test - 1 - Question 11

Following graph is showing the variation of potential energy between a pair of nucleons as a function of their separation. Indicate the regions A and B.

Detailed Solution for NEET Practice Test - 1 - Question 11

Above graph shows the variation of potential energy between a pair of nucleons as a function of their separation.

NEET Practice Test - 1 - Question 12

Two nucleons are at a separation of one Fermi. Protons have a charge of +1.6×10−19C. The net nuclear force between them is F1, if both are neutrons, F2, if both are protons F3, if one is proton and the other is neutron, Then :

Detailed Solution for NEET Practice Test - 1 - Question 12

Nuclear forces are charge independent so,

F1 = F2 = F3

NEET Practice Test - 1 - Question 13

An electric dipole of dipole moment 4×10−5 Cm is placed in a uniform electric field of 10−3 NC−1 making an angle of 30° with the direction of field. Determine the torque exerted by the electric field on the dipole.

Detailed Solution for NEET Practice Test - 1 - Question 13

Torque experienced by an electric dipole in uniform electric field is given by:

NEET Practice Test - 1 - Question 14

Figure shows a capacitor made of two circular plates each of radius 12 cm and separated by 5.0 cm. The capacitor is being charged by an external source (not shown in the figure). The charging current is constant and equal to 0.15 A.

Calculate the capacitance and the rate of charge of potential difference between the plates.

Detailed Solution for NEET Practice Test - 1 - Question 14

Given, radius of plates r = 12 cm = 12 x 10–2Separation of two circular plates

d = 5 cm = 5 × 10–2m

Current I = 0.15 A

Capacitance of parallel plate capacitor

where, A is the area of plates.

Charge on the plates of the capacitor

q = CV

Thus, the rate of change of potential is 18.7 x 109 V/s.

NEET Practice Test - 1 - Question 15

If the molecular weight of two gases are M1 and M2, then at a temperature the ratio of RMS velocity c1 and c2 will be

Detailed Solution for NEET Practice Test - 1 - Question 15

NEET Practice Test - 1 - Question 16

The change in internal energy of a thermodynamical system which has absorbed 5000 cal of heat and does 5000 J of work is

Detailed Solution for NEET Practice Test - 1 - Question 16

Q = W + U

U = Q – W = 5 × 103 × 4.2 – 5000

= 16000 J

NEET Practice Test - 1 - Question 17

Three moles of nitrogen is mixed with six moles of helium. The effective molar specific heat of the mixture at constant volume is

Detailed Solution for NEET Practice Test - 1 - Question 17

NEET Practice Test - 1 - Question 18

When the door of a refrigerator is kept open then the room temperature

Detailed Solution for NEET Practice Test - 1 - Question 18

Room become hotter, when door of refrigerator is

opened.

NEET Practice Test - 1 - Question 19

A vessel has 10 g of hydrogen gas at pressure P and temperature 400 K. A small hole is made in it so that hydrogen leaks out. How much hydrogen leaks out if the final pressure becomes half and temperature becomes 3/4th of its previous value?

Detailed Solution for NEET Practice Test - 1 - Question 19

Let x g gas leaks out

NEET Practice Test - 1 - Question 20

If three molecules of oxygen at 27ºC have velocities 0.5 km/s, 1 km/s and 2 km/s respectively. Then their root mean square speed will be

Detailed Solution for NEET Practice Test - 1 - Question 20

NEET Practice Test - 1 - Question 21

Temperature versus pressure graph of an ideal gas is shown in the figure. If density of gas at point P is then density of gas at point Q will be

Detailed Solution for NEET Practice Test - 1 - Question 21

From ideal gas equation

NEET Practice Test - 1 - Question 22

For a rigid diatomic molecules, molar specific heat at constant pressure is given by CP = R/x, where R is universal gas constant and x is number value. Then 3.5x will be

Detailed Solution for NEET Practice Test - 1 - Question 22

For a rigid diatomic molecule

NEET Practice Test - 1 - Question 23

Which of the following is not an assumption of kinetic theory of gases?

Detailed Solution for NEET Practice Test - 1 - Question 23

Molecules of an ideal gas move with different speed in all possible direction.

NEET Practice Test - 1 - Question 24

Which of the following law of thermodynamics forms the basis for the definition of temperature?

Detailed Solution for NEET Practice Test - 1 - Question 24

Definition of temperature is based on Zeroth law of thermodynamics.

NEET Practice Test - 1 - Question 25

Which of the following diagram represent the isometric process correctly?

Detailed Solution for NEET Practice Test - 1 - Question 25

For isometric or isochoric process, volume of the system remain constant during the change.

P = KT (straight line)

NEET Practice Test - 1 - Question 26

The work done by the system in the cyclic process as shown in figure is

Detailed Solution for NEET Practice Test - 1 - Question 26

Work done = Area of loop

NEET Practice Test - 1 - Question 27

A cyclic process for one mole of an ideal gas is shown in the V–T diagram. The work done by the gas in AB, BC and CA respectively are

Detailed Solution for NEET Practice Test - 1 - Question 27

CA is isochoric process WCA = zero

During AB, process is isothermal T = 0

During BC, process is isobaric, P = 0

NEET Practice Test - 1 - Question 28

A box of negligible mass containing n moles of an ideal gas of molar mass M and adiabatic exponent moves with constant speed v on a smooth horizontal surface. If box suddenly stops, then change in temperature of gas will be

Detailed Solution for NEET Practice Test - 1 - Question 28

NEET Practice Test - 1 - Question 29

If CP and CV denoted the specific heat of unit gram mass of nitrogen at constant pressure and volume respectively, then (R is universal gas constant)

Detailed Solution for NEET Practice Test - 1 - Question 29

For unit mass,

NEET Practice Test - 1 - Question 30

At what temperature the root mean square speed of molecules of a gas is twice of its root mean square speed at 27ºC?

Detailed Solution for NEET Practice Test - 1 - Question 30

On solving t = 927ºC

NEET Practice Test - 1 - Question 31

The mean free path of molecules of a gas, of diameter d is inversely proportional to

Detailed Solution for NEET Practice Test - 1 - Question 31

Mean free path

NEET Practice Test - 1 - Question 32

P-T diagram is shown in given figure. Which of the following graph correctly represents the

corresponding V-T diagram?

Detailed Solution for NEET Practice Test - 1 - Question 32

Process AB and CD are isothermal process. BC is isochoric. VB > VA, VB = VC and VD > VC. There all process are correctly represented by option (4)

NEET Practice Test - 1 - Question 33

Match the Column I with Column II.

Detailed Solution for NEET Practice Test - 1 - Question 33

NEET Practice Test - 1 - Question 34

Assertion (A): Classical Physics mainly includes subjects like Mechanics, Electrodynamics, Optics and Thermodynamics.

Reason (R): The macroscopic domain includes phenomena at the laboratory, terrestrial and astronomical scales.

Detailed Solution for NEET Practice Test - 1 - Question 34

Assertion is true since classical physics mainly includes subjects like Mechanics, Electrodynamics, Optics and Thermodynamics. Mechanics is concerned with the motion (or equilibrium) of particles, rigid and deformable bodies, and general systems of particles. Electrodynamics deals with electric and magnetic phenomena associated with charged and magnetic bodies. Optics deals with the phenomena involving light. The working of telescopes and microscopes, colours exhibited by thin films, etc., are topics in optics. Thermodynamic deals with systems in macroscopic equilibrium and is concerned with changes in internal energy, temperature, entropy, etc., of the system through external work and transfer of heat. So all these are in macroscopic domain. So reason is also true and properly explains the assertion.

NEET Practice Test - 1 - Question 35

Given below are two statements

Statement I: Biot-Savart’s law gives us the expression for the magnetic field strength of an infinitesimal current element (Idl) of a current carrying conductor only.

Statement II: Biot-Savart’s law is analogous to Coulomb’s inverse square law of charge q, with the former being related to the field produced by a scalar source, Idl while the latter being produced by a vector source, q. In light of above statements choose the most appropriate answer from the options given below

Detailed Solution for NEET Practice Test - 1 - Question 35
According to Biot-Savart’s law which is applicable for infinitesimal element. It is analogous to Coulomb’s law, where is vector source and electric field is produced by scalar source q.

Here statement I is correct and statement II is incorrect.

NEET Practice Test - 1 - Question 36

An RLC series circuit is driven by a sinusoidal emf with angular frequency ⍵ If ⍵ is increased without changing the amplitude of the emf, the current amplitude increases. If the inductance is L, the capacitance is C and the resistance R, it implies:

Detailed Solution for NEET Practice Test - 1 - Question 36

For the series LCR Circuit,

with the increase in frequency XL increases and Xc decreases.

But it is given that the current increases with increase in frequency, circuit is below response so circuit is capacitive in nature [At resonance (XL = XC)]

NEET Practice Test - 1 - Question 37

Two photons of energies twice and thrice the work function of a metal are incident on the metal surface. The ratio of maximum velocities of the photoelectrons emitted in the two cases, respectively, is

Detailed Solution for NEET Practice Test - 1 - Question 37

Let v1 and v2 be the maximum velocities of photo-electrons in the two cases. The energies of photon are given by

Given E1 and 2W0 and E2 = 3W0. Using these in (i) and (ii), we have

From (iii) and (iv), we get which is choice (4).

NEET Practice Test - 1 - Question 38

The mass of an oxygen molecule is about 16 times that of a hydrogen molecule. At room temperature, the rms speed of the oxygen molecules is vo. The rms speed of the hydrogen molecules at the same temperature will be

Detailed Solution for NEET Practice Test - 1 - Question 38

Hence the correct choice is (3)

NEET Practice Test - 1 - Question 39

The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately

Detailed Solution for NEET Practice Test - 1 - Question 39

= 310 nm, which is choice (3)

NEET Practice Test - 1 - Question 40

Consider the following statements (A) and (B) and identify the correct answer.

Statement I (A): A zener diode is connected in reverse bias, when used as a voltage regulator.

Statement I (B): The potential barrier of p-n junction lies between 0.1 V to 0.3 V.

Detailed Solution for NEET Practice Test - 1 - Question 40

When Zener diode is forward biased, it behaves like ordinary diode and when reverse biased, it will be a voltage stabilizer. Also, at room temperature, the voltage across the depletion layer for silicon is about 0.6−0.7V and for germanium is about 0.3−0.35V Hence, statement A is correct but statement B is wrong.

NEET Practice Test - 1 - Question 41

Assertion: Parallex method cannot be used for measuring distances of stars more than 100 light years away.

Reason: Because parallex angle reduces so much that it cannot be measured accurately.

Detailed Solution for NEET Practice Test - 1 - Question 41

Parallax angle θ = I/r

As distance of (r ) increases, θ reduces.

Measurement becomes inaccurate.

NEET Practice Test - 1 - Question 42

Match the Column I with Column II.

Detailed Solution for NEET Practice Test - 1 - Question 42

NEET Practice Test - 1 - Question 43

Solar radiation is an example of

Detailed Solution for NEET Practice Test - 1 - Question 43

Solar radiations are transverse electromagnetic waves. The central core of the sun emits a continuous electromagnetic spectrum.

NEET Practice Test - 1 - Question 44

If a spring extends by xx on loading then the energy stored in the spring is (if T is the tension and kk is the force constant of the of the spring).

Detailed Solution for NEET Practice Test - 1 - Question 44

In equilibrium, T=mgT=mg

Work done=mg=mgx=1/2kx2

Energy stored=mgx=Tx

NEET Practice Test - 1 - Question 45

A tuning fork of frequency 512 Hz is used to produce vibrations in a sonometer wire of natural frequency 256 Hz. The wire will vibrate in

Detailed Solution for NEET Practice Test - 1 - Question 45

As the wire is forced to have a frequency = 512 = 2 x 256 = 2n, therefore, it must vibrate in two segments.

NEET Practice Test - 1 - Question 46

An excited hydrogen atom emits a photon of wavelength λ in returning to the ground state. If R is the Rydberg constant, then the quantum number n of the excited state is

Detailed Solution for NEET Practice Test - 1 - Question 46

NEET Practice Test - 1 - Question 47

The most stable ion is

Detailed Solution for NEET Practice Test - 1 - Question 47
Stability of a complex depends on the ligand, ligands which can form pi- bond forms more stable complex.

CN- is strong field ligand and forms pi-bond, so among the given options [Fe(CN)6]3- forms the most stable complex.

NEET Practice Test - 1 - Question 48

RNA is different from DNA because RNA contains

Detailed Solution for NEET Practice Test - 1 - Question 48
RNA is ribonucleic acid, it contains ribose sugar and uracil. In DNA molecules, the sugar is 2-deoxyribose. In DNA, four bases are found. They are adenine (A), guanine (G), cytosine (C) and thymine (T). The first three bases are found in RNA also, but the fourth is uracil (U).
NEET Practice Test - 1 - Question 49

The first and second dissociation constants of an acid H2A are 1.0 × 10−5 and 5 × 10−10, respectively. What is the overall dissociation constant of the acid?

Detailed Solution for NEET Practice Test - 1 - Question 49

First step dissociation reaction

Second step dissociation reaction:

Overall reaction:

NEET Practice Test - 1 - Question 50

The signs of ΔH, ΔS, and ΔG for a non-spontaneous reaction at all temperatures would be respectively

Detailed Solution for NEET Practice Test - 1 - Question 50
ΔG=+vefor non-spontaneous reactions

As ΔG = ΔH − TΔS

Thus ΔH should be positive and ΔS should be negative, thus ΔG will be positive at all temperatures.

NEET Practice Test - 1 - Question 51

Which of the following is the primary precursor of photochemical smog?

Detailed Solution for NEET Practice Test - 1 - Question 51
Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere. It is visible as a brown haze, and is most prominent during the morning and afternoon, especially in densely populated, warm cities.

Nitrogen oxide is primary precursor of photochemical smog.

NEET Practice Test - 1 - Question 52

An organic compound (C3H9N) (A), when treated with nitrous acid, gave an alcohol and N2 gas was evolved. (A) on warming with CHCl3 and caustic potash gave (C) which on reduction gave is opropylmethylamine. Predict the structure of (A).

Detailed Solution for NEET Practice Test - 1 - Question 52
As a gives alcohol on treatment with nitrous acid thus it should be primary amine. C3H9N has two possible structures with - NH2 group.

NEET Practice Test - 1 - Question 53

The number of anti-bonding electron pairs in O22− molecular ion on the basis of molecular orbital theory is (Atomic number of Oxygen is 8)

Detailed Solution for NEET Practice Test - 1 - Question 53
The electronic configuration of O22− ion is

Hence, number of anti-bonding electron pair in O22− molecular ion are four.

NEET Practice Test - 1 - Question 54

What is the correct order of solubility of the sulphates of alkaline earth metals in water?

Detailed Solution for NEET Practice Test - 1 - Question 54
(i) Solubility of sulphates of alkaline earth metals regularly decreases on moving down the group because as solubility product goes down from BeSO4 to BaSO4. Hence, the order of solubility of their sulphates is

(ii) The bigger size of cation makes a stronger bond with bigger anion (SO4-2) and their solubility decrease as bond strength increases. On moving top to bottom in alkaline group, size increases. So, bond strength increases; hence, solubility decreases top to bottom.

NEET Practice Test - 1 - Question 55

Which among the following is a synthetic polymer?

Detailed Solution for NEET Practice Test - 1 - Question 55
Phenol-formaldehyde resin is not a synthetic polymer.
NEET Practice Test - 1 - Question 56

The reagent used in Gattermann Koch aldehyde synthesis is

Detailed Solution for NEET Practice Test - 1 - Question 56
The Gattermann-Koch aldehyde synthesis is as follows.

NEET Practice Test - 1 - Question 57

(+) and (−) forms of optically active compounds are different in

Detailed Solution for NEET Practice Test - 1 - Question 57
If a substance rotates the plane polarised light in clock-wise direction it is dextro rotatory (+). If it rotates the plane polarised light in anti-clockwise direction then it is laevorotatory (−).
NEET Practice Test - 1 - Question 58

Number of moles in 11.2 L of CO2 at NTP is -

Detailed Solution for NEET Practice Test - 1 - Question 58

As we know,

1 mole1 mole of gas occupies 22.4 L at NTP.

So, moles of 11.2 L CO2 is,

n = 11.2 / 22.4 = 0.5

NEET Practice Test - 1 - Question 59

The half-life period for catalytic decomposition of AB3 at 50 mm of Hg is found to be 4 hrs and at 100 mm of Hg it is 2 hrs. The order of the reaction is:

Detailed Solution for NEET Practice Test - 1 - Question 59

n = 2

Therefore, the order of reaction is 2.

NEET Practice Test - 1 - Question 60

f the quantum numbers of the electron having the highest energy in an atom are n = 3, l = 1, ml = +1, s = +1 / 2, the element belongs to

Detailed Solution for NEET Practice Test - 1 - Question 60
The last electron enters the p - subshell of outermost shell.
NEET Practice Test - 1 - Question 61

Given below are two statements :

Statement I : Aspirin and Paracetamol belong to the class of narcotic analgesics.

Statement II: Morphine and Heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer from the options given below.

Detailed Solution for NEET Practice Test - 1 - Question 61
• Aspirin and paracetamol belong to the class of non-narcotic analgesics.

• Morphine and Heroin are Narcotic analgesics.

∴ Both statement I and statement II are false

NEET Practice Test - 1 - Question 62

Match List-I with List-II.

Detailed Solution for NEET Practice Test - 1 - Question 62

NEET Practice Test - 1 - Question 63

Directions: In the following questions a statement of assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choice given below.

Assertion (A): combustion of 16 g of methane gives 18g of water.

Reason (R): In the combustion of methane, water is one of the products.

Detailed Solution for NEET Practice Test - 1 - Question 63

Combustion of 16 g of methane gives 36 g of water.

NEET Practice Test - 1 - Question 64

The species in which central atom is not sp3 hybridised is

Detailed Solution for NEET Practice Test - 1 - Question 64

nitrogen is sp2 hybridised

NEET Practice Test - 1 - Question 65

Which among the following has longest bond length?

Detailed Solution for NEET Practice Test - 1 - Question 65
Lesser is the bond order, longer is the bond length.

Bond order =

Bond order of

= 1

has lowest bond order among the given options hence the bond length will be longest.

NEET Practice Test - 1 - Question 66

Which among the following is a polar molecule?

Detailed Solution for NEET Practice Test - 1 - Question 66
The species which has non-zero net dipole moment will be polar.
NEET Practice Test - 1 - Question 67

Which of the following pairs of species are isostructural?

Detailed Solution for NEET Practice Test - 1 - Question 67

Both P and S in respectively are sp3 hybridised hence they are tetrahedral in shape

NEET Practice Test - 1 - Question 68

Consider the following statements

A. Bond angle of ammonia is greater than bond angle of H2O.

B. In BeCl2 central atom is sp hybridised

C. In CCl4 maximum four atoms are present in a

plane.

The correct statement(s) is/are

Detailed Solution for NEET Practice Test - 1 - Question 68
• Bond angle of NH3 is 107°

Bond angle of H2O is 104.5°
• maximum three atoms are present in a plane
NEET Practice Test - 1 - Question 69

In which of the given molecules only bonds are present?