Class 11 Thermodynamics MCQs with Answer

Class 11 chemistry MCQs with answers are provided here for Thermodynamics. These MCQs are based on CBSE board curriculum and correspond to the most recent Class 11 chemistry syllabus. By practicing these Class 11 Multiple choice questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 11 Annual examinations Class 11 Chemistry MCQs.

Class 11 Chemistry Thermodynamics MCQs with Answer

Q1.

Q2. Two moles of an ideal gas is expanded isothermally and reversibly from 1L to 10L at 300K. The enthalpy change
(in kJ) for the process is:

1. 11.4kJ
2. -11.4kJ
3. 0kJ
4. 4.8kJ

Q3.

Q4

Q5. What is the change in the energy of system if 500cal of heat energy are added to a system and system does
350cal of work on the surroundings?

1. -150cal
2. +150cal
3. +850cal
4. -850cal

Q6. Which of the following are state functions?

1. Enthalpy.
2. Heat.
3. Free energy.
4. Work.

Q7. Which of the following is an extensive property?

1. Temperature.
2. Density.
3. Gibbs free energy.
4. Molar volume.

Q8. In the given reaction, Na(s) → Na(g)
The enthalpy of atomisation is same as the:

1. Enthalpy of dissociation.
2. Enthalpy of sublimation.
3. Enthalpy of association.
4. Enthalpy of vaporisation.

Q9. The enthalpy of vapourisation of a liquid is 30kJ mol^-1 and enthalpy of vapourisation is 75J mol^-1 . The boiling
point of the liquid at 1atm is:

1. 250K
2. 400K
3. 450K
4. 600K

Q10. Lattice enthalpies are determined by:

1. Born-Haber cycle.
2. Hess’ law.
3. Lattice cycle.
4. None of these

Q11. A reaction, A + B + C + D + q is found to have a positive entorpy change. The reaction will be:

1. Possible at high temperature.
2. Possible only at low temperature.
3. Not possible at any temperature.
4. Possible at any temperature.

Q12. The enthalpy change when one mole of solute dissolves in a specified amount of solvent is called:

1. Enthalpy of dilution.
2. Enthalpy of solution.
3. Enthalpy of association.
4. Enthalpy of dissociation.

Q13. Entropy is:

1. A thermodynamic concept.
2. A state function.
3. Independent of path.
4. All of the above.

Q14. Enthalpy of sublimation of a substance is equal to,

1. Enthalpy of fusion + enthalpy of vapourisatio.
2. Enthalpy of fusion.
3. Enthalpy of vapourisatio.
4. Twice the enthalpy of vapourisation.

Q15. Hess’s law is based on:

1. Law of conservation of mass.
2. Law of conservation of energy.
3. Law of active mass.
4. Both (a) and (b).

Q16. The volume of gas is reduced to half from its original volume. The specific heat will be __.

1. Reduce to half.
2. Be doubled.
3. Remain constant.
4. Increase four times.

Q17. Which of the following properties is the measure of the degree of randomness or disorder in the system?

1. Entropy.
2. Enthalpy.
3. Internal energy.
4. None of these.

Q18. Choose the correct answer. A thermodynamic state function is a quantity:

1. Used to determine heat changes.
2. Whose value is independent of path.
3. Used to determine pressure volume work.
4. Whose value depends on temperature only.

Q19. The enthalpies of elements in their standard states are taken as zero.The enthalpy of formation of a compound.

1. Is always negative.
2. Is always positive.
3. May be positive or negative.
4. Is never negative.

Q20. The state of gas can be described by quoting the relationship between,

1. Pressure, volume, temperature.
2. Temperature, amount, pressure.
3. Amount, volume, temperature.
4. Pressure, volume, temperature, amount.

Q21. Which of the following statements is correct?

1. The presence of reacting species in a covered beaker is an example of open system.
2. There is an exchange of energy as well as matter between the system and the surroundings in a closed
   system.
3. The presence of reactants in a closed vessel made up of copper is an example of a closed system.
4. The presence of reactants in a thermos flask or any other closed insulated vessel is an example of a closed
   system.

Q22.

Q23.

Q24.

Q48. A gas is allowed to expand in a well-insulated container against a constant eternal pressure of 2.5atm from an
initial volume of 2.50L to a final volume of 4.50L The change in internal energy in Joule’s will he:

1. -500J
2. -506J
3. +505J
4. 1136.25J

Q25.