NCERT Class 11 Chapter 6 Chemistry Chemical Thermodynamics MCQ

NCERT Class 11 Chapter 6 Chemistry Chemical Thermodynamics MCQ | Questions & Answers: The students of Class 11 have wonderful opportunity to make use of the Class 11 Chapter 6 Chemistry Chemical Thermodynamics MCQ Quiz that we have accommodated here. Check out this article and attempt the quiz right away.

Page 1 of 3

1. Thermodynamics is not concerned about

A. the rate at which a reaction proceeds

B. the feasibility of a chemical reaction

C. the extent to which a chemical reaction proceeds

D. energy changes involved in a chemical reaction

2. Which of the following statements is not true regarding the laws of thermodynamics ?

A. It deal with energy changes of microscopic systems

B. It does not depends on the rate at which these energy transformations are carried out.

C. It depends on initial and final states of a system undergoing the change.

D. It deals with energy changes of macroscopic systems

3. A ___________in thermodynamics refers to that part of universe in which observations are made and remaining universe constitutes the ___________

A. system, surroundings

B. system, boundary

C. surroundings, system

D. system, surroundings

4. The universe refers to

A. both system and surroundings

B. None of these

C. only surroundings

D. only system

5. Which of the following statements is correct?

A. The presence of reactants in a closed vessel made up of copper is an example of a closed system.

B. The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed system.

C. There is an exchange of energy as well as matter between the system and the surroundings in a closed system.

D. The presence of reacting species in a covered beaker is an example of open system

6. Which of the following is closed system ?

A. Pressure cooker

B. Rocket engine during propulsion

C. Tea placed in a steel kettle

D. Jet engine

7. An isolated system is that system in which

A. There is no exchange of mass or energy with the surroundings

B. There is exchange of mass with the surroundings

C. There is exchange of mass and energy with the surroundings

D. There is no exchange of energy with the surroundings

8. The state of a thermodynamic system is described by its measurable or macroscopic (bulk) properties. These are

A. Pressure, volume, temperature and amount

B. Volume, temperature and amount

C. Pressure and temperature

D. Pressure and volume

9. Among the following the state function(s) is (are)
(i) Internal energy
(ii) Irreversible expansion work
(iii) Reversible expansion work
(iv) Molar enthalpy

A. (i) and (iv)

B. (ii) and (iii)

C. (i), (ii) and (iii)

D. (i) only

10. ___________ is a quantity which represents the total energy of the system

A. Internal energy

B. Electrical energy

C. Chemical energy

D. Mechanical energy

Page 2 of 3

11. Which of the following factors affect the internal energy of the system ?

A. All of the above

B. Matter enters or leaves the system

C. Work is done on or by the system.

D. Heat passes into or out of the system

12. The system that would not allow the exchange of heat between the system and surroundings through its boundary is considered as

A. adiabatic

B. isochoric

C. isobaric

D. isothermal

13. The enthalpy change of a reaction does not depend on

A. Different intermediate reactions

B. Initial and final enthalpy change of a reaction

C. Nature of reactants and products

D. The state of reactants and products

14. The q is ____ when heat is transferred from the surroundings to the system and q is ______ When heat is transferred from system to the surroundings

A. positive, negative

B. high, low

C. negative, positive

D. low, high

15. Which of the following statements is incorrect?

A. Both

B. q is a path-dependent function.

C. H is a state function

D. None of these

16. The work done during the expansion of a gas from a volume of 4 dm3 to 6 dm³ against a constant external pressure of 3 atm is (1 L atm = 101.32 J)

A. – 608 J

B. – 304 J

C. – 6 J

D. + 304 J

17. During isothermal expansion of an ideal gas, its

A. enthalpy remains unaffected

B. enthalpy reduces to zero.

C. enthalpy decreases

D. internal energy increases

18. The enthalpies of elements in their standard states are taken as zero. The enthalpy of formation of a compound

A. may be positive or negative

B. is never negative

C. is always positive

D. is always negative

19. ong the following, the intensive properties are
(i) molar conductivity (ii) electromotive force
(iii) resistance (iv) heat capacity

A. (ii) and (iii)

B. (i) and (iv)

C. (i), (ii) and (iii)

D. (i) only

20. Which is an extensive property of the system ?

A. Volume

B. Viscosity

C. Temperature

D. Refractive index

Page 3 of 3

21. Third law of thermodynamics provides a method to evaluate which property?

A. Absolute Energy

B. Absolute Enthalpy

C. Absolute Entropy

D. Absolute Free Energy

22. One mole of which of the following has the highest entropy?

A. Liquid Nitrogen

B. Hydrogen Gas

C. Mercury

D. Diamond

23. The enthalpy of vaporization of a substance is 8400 J mol-1 and its boiling point is –173°C. The entropy change for vaporization is :

A. 84 J mol^-1K^-1

B. 21 J mol^-1K^-1

C. 49 J mol^-1K^-1

D. 12 J mol^-1K^-1

24. The species which by definition has ZERO standard molar enthalpy of formation at 298 K is

A. Br₂(g)

B. Cl₂(g)

C. H₂O(g)

D. CH₄(g)

25. In a reversible process, the system absorbs 600 kJ heat and performs 250 kJ work on the surroundings. What is the increase in the internal energy of the system?

A. 850 kJ

B. 600 kJ

C. 350 kJ

D. 250 kJ