Blog Log in Get Started Free

Chemistry MCQs for NEET — Practice Questions with Answers

Practice free Chemistry NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

All Physics Chemistry Botany Zoology

Chapter Language Difficulty Show only questions I answered incorrectly Register free to filter questions

● ● ● ● ●

For which process will $∆$ H° and $∆$ G° be expected to be most similar.

2Al(s) + Al₂O₃(s) → 2Fe(s) + A_l2O₃(s)

2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)

2NO₂(g) → N₂O₄(g)

2H₂(g) + O₂(g) → 2H₂O(g)

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

All product and reactants are in solid state

So ΔS° ≈ 0

ΔG° = ΔH – TΔS°

So ΔG° ≈ ΔH°

● ● ● ● ●

Heat produced in calories by the combustion of one gram of carbon is called

Heat of combustion of carbon

Heat of formation of carbon

Calorific value of carbon

Heat of production of carbon

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

It is the definition of calorific value.

● ● ● ● ●

For the isothermal expansion of an ideal gas

E and H increases

E increases but H decreases

H increases but E decreases

E and H are unaltered

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

In isothermal reversible process ideal gas has constant temperature and so ΔE = 0 and ΔH = ΔE = 0.

● ● ● ● ●

If a refrigerator's door is opened, then we get [CPMT 1980]

Room heated

Room cooled

More amount of heat is passed out

No effect on room

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The compressor has to run for longer time releasing more heat to the surroundings.

● ● ● ● ●

Point out the wrong statement in relation to enthalpy

It is a state function

It is an intensive property

It is independent of the path followed for the change

Its value depends upon the amount of substance in the system

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

Enthalpy is an extensive property.

● ● ● ● ●

Mark the correct statement

For a chemical reaction to be feasible, ΔG should be zero

Entropy is a measure of order in a system

For a chemical reaction to be feasible, ΔG should be positive

The total energy of an isolated system is constant

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

Total energy of an isolated system is constant.

● ● ● ● ●

Internal energy is an example of [Pb. PMT 2000]

Path function

State function

Both (1) and (2)

None of these

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The functions whose value depends only on the state of a system are known as state functions.

● ● ● ● ●

The intensive property among these quantities is [KCET 2002]

Enthalpy

Mass/volume

Mass

Volume

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

The intensive property is mass/volume.

● ● ● ● ●

Which of the following is not a state function [DCE 2002]

ΔS

ΔG

ΔH

ΔQ

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

ΔQ is not a state function.

● ● ● ● ●

Which of the following is true for an adiabatic process [DCE 2002; MP PET 1995, 98, 2004; CPMT 1990; MP PMT 1998, 2002]

ΔH = 0

ΔW = 0

ΔQ = 0

ΔV = 0

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

For adiabatic process ΔQ = 0.

Ready to ace NEET?

Free access · No credit card required

Browse All Questions Create Free Account

Frequently Asked Questions

Yes. You can attempt every Chemistry question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.

No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.

The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.