Thermodynamics – Objective Questions

Page 9 : Assertion–Reason & Multi-Correct (JEE Advanced)

Directions:
(A) Both A and R are true and R is correct explanation of A
(B) Both A and R are true but R is not explanation of A
(C) A is true, R is false
(D) A is false, R is true

Q76. Assertion (A): Internal energy of an ideal gas depends only on temperature.
Reason (R): There are no intermolecular forces in an ideal gas.

Answer: A

Q77. A: In a cyclic process, net change in internal energy is zero.
R: Internal energy is a state function.

Answer: A

Q78. A: An adiabatic process is always fast.
R: No heat is exchanged with surroundings.

Answer: D

Trap: Adiabatic ≠ fast always.

Q79. A: Carnot engine is the most efficient heat engine.
R: It is a reversible engine.

Answer: A

Q80. A: Heat is a form of energy.
R: Heat can be stored in a body.

Answer: C

Multi-Correct Questions

Q81. Which of the following are state functions?

• 1) Internal energy
• 2) Enthalpy
• 3) Heat
• 4) Work

Answer: 1, 2

Q82. During free expansion of ideal gas:

• 1) Work done = 0
• 2) Heat exchanged = 0
• 3) Temperature changes
• 4) Internal energy remains constant

Answer: 1, 2, 4

Q83. Which processes have ΔU = 0?

• 1) Isothermal (ideal gas)
• 2) Cyclic process
• 3) Adiabatic
• 4) Isochoric

Answer: 1, 2

Q84. Which statements are correct for Carnot cycle?

• 1) Completely reversible
• 2) Maximum efficiency
• 3) Depends on working substance
• 4) Depends on temperature of reservoirs

Answer: 1, 2, 4

Q85. For an ideal gas:

• 1) Cp > Cv
• 2) Cp − Cv = R
• 3) γ > 1
• 4) Cp = Cv

Answer: 1, 2, 3

Page 9 Completed ✔
You are now in Top 1% Thermodynamics readiness

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🔥 Thermodynamics – Objective Final Revision

Thermodynamics – Set 1
Set 2
Set 3
Set 4
Set 5
Set 6
Set 7
Set 8
Set 9
Set 10
Set 11
Set 12
Set 13
Set 14
Set 15
Set 16
Set 17
Set 18
Set 19
Set 20
Set 21
Set 22
Set 23
Set 24
Set 25
Set 26
Set 27
Set 28
Set 29
Set 30
Set 31
Set 32
Set 33
Set 34
Set 35
Set 36
Set 37
Set 38
Set 39
Set 40
Set 41
Set 42
Set 43
Set 44
Set 45
Set 46
Set 47
Set 48
Set 49
Set 50
Set 51
Set 52
Set 53
Set 54
Set 55
Set 56
Set 57
Set 59

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