# MCQ Questions for Class 11 Physics Chapter 12 Thermodynamics with Answers

Here you will find NCERT MCQ Questions for Class 11 Physics with Answers PDF Free Download based on the important concepts and topics given in the textbook as per CBSE new exam pattern. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Class 11 Physics. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

(a) work
(b) volume
(c) pressure
(d) Temperature

(a) work

(a) 900 cal
(b) 625 cal
(c) 750 cal
(d) 1000 cal

(a) 900 cal

(a) 10 J
(b) 20 J
(c) 30 J
(d) 50 J

(c) 30 J

(a) 20 J
(b) −20 J
(c) 80 J
(d) zero

(a) 20 J

(a) 275 K
(b) 325 K
(c) 250 K
(d) 380 K

(c) 250 K

(a) 5 : 3
(b) 3 : 5
(c) 1 : 1
(d) 5 : 7

(c) 1 : 1

## Q7. Calculate the heat required to make 6.4 Kg CaC2 from CaO(s) and C(s) from the reaction: CaO(s) + 3 C(s) ? CaC2(s) + CO (g) given that ?f Ho (CaC2) = -14.2 kcal. ?f H° (CO) = -26.4 kcal.

(a) 5624 kca
(b) 1.11 × 104 kcal
(c) 86.24 × 10³
(d) 1100 kcal

(b) 1.11 × 104 kcal

(a) -36 kJ
(b) -13 kJ
(c) -47 kJ
(d) 24 kJ

(c) -47 kJ

(a) 100 kJ
(b) 10 kJ
(c) 0 kJ
(d) 1 kJ

(b) 10 kJ

## Q10. In which of the following process, a maximum increase in entropy is observed?

(a) Dissolution of Salt in Water
(b) Condensation of Water
(c) Sublimation of Naphthalene
(d) Melting of Ice

(c) Sublimation of Naphthalene

(a) 1
(b) 10
(c) 83-85
(d) 1000

(c) 83-85

## Q12. The first operation involved in a Carnot cycle is

a) isothermal expansion
c) isothermal compression

a) isothermal expansion

## Q13. “Heat cannot by itself flow from a body at lower temperature to a body at higher temperature” is a statement or consequence of

a) second law of thermodynamics
b) conservation of momentum
c) conservation of mass
d) first law of thermodynamics

a) second law of thermodynamics

## Q14. Air conditioner is based on the principle of

a) refrigerator
b) first law of thermodynamics
c) None of these
d) Carnot cycle

a) refrigerator

## Q15. Which of the following processes is reversible?

a) Isothermal compression
b) Electrical heating of a nichrome wire
c) Transfer of heat by radiation
d) Transfer of heat by conduction

a) Isothermal compression

## Q16. Which of the following processes is irreversible?

a) Transfer of heat by radiation
b) Adiabatic changes performed slowly
c) Extremely slow extension of a spring
d) Isothermal changes performed slowly

a) Transfer of heat by radiation

## Q17. Heat engine is a device by which a system is made to undergo a …X… process that result in conversion of …Y… into work. Here, X and Y refer to

a) cyclic and heat
b) None of these
c) isothermal and heat
d) cyclic and work

a) cyclic and heat

## Q18. Which of the following statements is incorrect?

a) All reversible cycles have same efficiency
b) Reversible cycle has more efficiency than an irreversible one
c) Carnot cycle is a reversible one
d) Carnot cycle has the maximum efficiency in all cycles

a) All reversible cycles have same efficiency

(a) 2
(b) 3/2
(c) 4/3
(d) 5/3

(b) 3/2

(a) ΔQ
(b) ΔW
(c) ΔQ + ΔW
(d) ΔQ – ΔW

(d) ΔQ – ΔW

a) 250 K
b) 230 K
c) 260 K
d) 240 K

a) 250 K

## Class 11 Physics MCQs Questions with Answers Chapter Wise

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