A thermodynamical system is changed from state$\left( {{p_1}{V_1}} \right){\rm{to}}\left( {{p_2},{V_2}} \right)$ by two different processes, the quantity which will remain same will be

${\rm{\Delta }}Q - {\rm{\Delta }}W$

${\rm{\Delta }}Q + {\rm{\Delta }}W$

Back to THERMODYNAMICS

Your Progress

0 / 16 Answered

Correct

Incorrect

Accuracy

JEE • PHYSICS • THERMODYNAMICS

Thermodynamics practice · Easy

Try a question, then open “View answer” to check it. Sign in to submit answers and save progress.

Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

Take a chapter quiz →

1 Easy

1 of 16

Application +4 | -1

A gas expand

0.25\,\,{m^3}

at constant pressure

{10^3}N/{m^2},

the work done is

View answer and explanation

Correct option: B

250 J

Option B (250 J) is correct because it accurately calculates the work done during the gas expansion at constant pressure.

2 Easy

2 of 16

Understanding +4 | -1

The increase in internal energy of a system is equal to the work done on the system. Which process does the system undergo?

View answer and explanation

Correct option: B

Adiabatic

Option B (Adiabatic) is correct because if the increase in internal energy equals the work done *on* the system, then no heat is exchanged with the surroundings, which is the definition of an adiabatic process.

3 Easy

3 of 16

Understanding +4 | -1

Statement-1: When an ideal gas is taken from a given thermodynamic state

A

to another given thermodynamic state

B

by any polytrophic process, the change in the interval energy of the system will be the same in all processes.
Statement-2: Internal energy of the gas depends only upon its absolute temperature.

View answer and explanation

Correct option: A

Statement-1 is true, Statement-2 is true, Statement-2 is the correct explanation for Statement-1

Option A (Statement-1 is true, Statement-2 is true, Statement-2 is the correct explanation for Statement-1) is correct because the change in internal energy depends only on the initial and final states, and for an ideal gas, internal energy depends only on temperature.

4 Easy

4 of 16

Understanding +4 | -1

When heat is added to a system, which of the following is not possible?

View answer and explanation

Correct option: C

Neither internal energy increases nor work is done by the system

Option C (Neither internal energy increases nor work is done by the system) is correct because the first law of thermodynamics dictates that added heat must either increase internal energy or do work.

5 Easy

5 of 16

Understanding +4 | -1

Assertion: The internal energy of a real gas is function of both, temperature and volume.
Reason: At constant pressure, some heat is spent in expansion of the gas.

View answer and explanation

Correct option: A

If both assertion and reason are true and reason is the correct explanation of the assertion

Option A (If both assertion and reason are true and reason is the correct explanation of the assertion) is correct because the internal energy of a real gas depends on both temperature and volume due to intermolecular forces, and energy is used for expansion at constant pressure.

6 Easy

6 of 16

Understanding +4 | -1

The work done in an isothermal expansion of a gas depends upon

View answer and explanation

Correct option: C

Both temperature and expansion ratio

Option C (Both temperature and expansion ratio) is correct because the work done in an isothermal expansion depends on both the temperature and the ratio of final to initial volume.

7 Easy

7 of 16

Understanding +4 | -1

Assertion: In adiabatic process work is independent of path.
Reason: In adiabatic process work done is equal to negative of change in internal energy.

View answer and explanation

Correct option: A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion

Option A is correct because in an adiabatic process, the work done is independent of the path and is equal to the negative change in internal energy, which is the correct explanation.

8 Easy

8 of 16

Understanding +4 | -1

A thermodynamical system is changed from state

\left( {{p_1}{V_1}} \right)\mathrm{to}\left( {{p_2},{V_2}} \right)

by two different processes, the quantity which will remain same will be

View answer and explanation

Correct option: D

\mathrm{\Delta }Q - \mathrm{\Delta }W

Option D (

{\Delta }Q - {\Delta }W

) is correct because the change in internal energy (

{\Delta }U

) is path-independent and equals

{\Delta }Q - {\Delta }W

9 Easy

9 of 16

Understanding +4 | -1

The internal energy of a system remains constant
when it undergoes

(A) a cycle process

(B) an isothermal process

(C) an adiabatic process

(D) any process in which the heat given out by the
system is equal to the work done on the system

Choose the correct statement

View answer and explanation

Correct option: D

A, B, D

Option A, B, D is correct because internal energy remains constant in a cyclic process, an isothermal process, and any process where heat given out equals work done.

10 Easy

10 of 16

Understanding +4 | -1

Which of the following is not a state function?

View answer and explanation

Correct option: B

Work done in isothermal process

Option B (Work done in isothermal process) is correct because work done is a path-dependent function, not a state function.

11 Easy

11 of 16

Understanding +4 | -1

Statement-1: A quasi-static process is so called because it is a sudden and large change of the system.
Statement-2: An adiabatic process is no quasi-static because it is a sudden and large change of the system.

View answer and explanation

Correct option: B

Statement-1 is true, Statement-2 is true, Statement-2 is not the correct explanation for Statement-1

Option D (Statement-1 is false, Statement-2 is true) is correct because a quasi-static process is slow and gradual, while an adiabatic process can be sudden.

12 Easy

12 of 16

Understanding +4 | -1

Heat added to a system is equal to

View answer and explanation

Correct option: D

Sum of above all the three factors

Option D (Sum of above all the three factors) is correct because, according to the first law of thermodynamics, heat added to a system equals the change in internal energy plus the work done by the system, and internal energy includes both kinetic and potential energy.

13 Easy

13 of 16

Understanding +4 | -1

For an isothermal expansion of a perfect gas, the value of

\frac{{\Delta P}}{P}

is equal

View answer and explanation

Correct option: B

- \frac{{\Delta V}}{V}

Option B is correct because for an isothermal process, the relationship between pressure and volume changes can be derived from the ideal gas law.

14 Easy

14 of 16

Understanding +4 | -1

Assertion: First law of thermodynamics is a restatement of the principle of conservation.
Reason: Energy is fundamental quantity.

View answer and explanation

Correct option: C

If assertion is true, but reason is false

The correct answer is C (If assertion is true, but reason is false) because the first law of thermodynamics is indeed a restatement of the principle of conservation of energy, but energy being a fundamental quantity is not the correct reason.

15 Easy

15 of 16

Understanding +4 | -1

A gas has

n

degrees of freedom. The ratio of specific heat of gas at constant volume to the specific heat of gas at constant pressure will be

View answer and explanation

Correct option: A

\frac{n}{n+2}

Option A (

\frac{n}{n+2}

) is correct because it represents the ratio of specific heat at constant volume to specific heat at constant pressure for a gas with n degrees of freedom.

Explore Other Chapters in PHYSICS

View All →

UNITS & MEASUREMENTS 633 MCQs WAVES 566 MCQs THERMAL PROPERTIES OF MATTER 564 MCQs WORK-ENERGY-POWER 553 MCQs MOTION IN PLANE 530 MCQs OSCILLATIONS 498 MCQs

16 Easy

16 of 16

Remembering +4 | -1

Which of the following has maximum specific heat

View answer and explanation

Correct option: A

Water

Option A (Water) is correct because water has a higher specific heat capacity compared to alcohol, glycerine, and oil.

Revision notes and key takeaways

Review THERMODYNAMICS in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 16 single-correct-answer MCQs on THERMODYNAMICS.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

Continue Your Practice

📚 Switch Set (EASY)

Chapter Sets

ALL 384 MCQs EASY 16 MCQs HARD 5 MCQs MEDIUM 363 MCQs

0 /16

0✓ 0✗

0% Accuracy