Class 11 Chemistry MCQ Chapter 6 Thermodynamics
Want to master Class 11 Chemistry MCQ Chapter 6 Thermodynamics English Medium? This article provides important multiple-choice questions (MCQs) with answers that are specially prepared for AHSEC Higher Secondary First Year students.
The chapter Thermodynamics deals with the study of energy changes during physical and chemical processes. In this chapter, students will learn about system and surroundings, types of thermodynamic processes, internal energy, heat, work, enthalpy, Hess’s Law, and the First Law of Thermodynamics. These concepts are important for understanding how energy is transferred and transformed in chemical reactions.
The MCQs provided here follow the latest AHSEC syllabus and examination pattern. They are designed to help students revise important formulas, strengthen conceptual understanding, and improve problem-solving skills. Regular practice of these objective questions can make exam preparation easier and more effective.
Whether you are preparing for class assessments, annual examinations, or the AHSEC HS First Year Final Examination, these MCQ solutions will help you gain confidence and score higher marks in Chemistry.
Part: I
Class 11 Chemistry MCQ Chapter 6 Thermodynamics
Selected VSA & MCQ
I. Very Short Answer Questions (VSA)
Q What is thermodynamics?
Ans: Study of energy changes in physical and chemical processes.
Q What is a system?
Ans: Part of the universe under study.
Q What are the surroundings?
Ans: Everything outside the system.
Q What is an open system?
Ans: A system that exchanges matter and energy.
Q What is a closed system?
Ans: A system that exchanges only energy.
Q What is an isolated system?
Ans: A system that exchanges neither matter nor energy.
Q What is internal energy?
Ans: Total energy of a system.
Q What is work?
Ans: Energy transfer due to force.
Q What is heat?
Ans: Energy transfer due to temperature difference.
Q What is state function?
Ans: Property depending only on state.
Q What is path function?
Ans: Property depending on path taken.
Q What is enthalpy?
Ans: Heat content of a system.
Q What is entropy?
Ans: Measure of randomness.
Q What is Gibbs free energy?
Ans: Energy available to do work.
Q What is first law of thermodynamics?
Ans: Energy is conserved.
Q What is second law of thermodynamics?
Ans: Entropy of universe increases.
Q What is spontaneous process?
Ans: Process that occurs naturally.
Q What is non-spontaneous process?
Ans: Process requiring energy input.
Q What is exothermic reaction?
Ans: Reaction releasing heat.
Q What is endothermic reaction?
Ans: Reaction absorbing heat.
Q What is reversible process?
Ans: Process that can be reversed.
Q What is irreversible process?
Ans: Process that cannot be reversed.
Q What is standard enthalpy?
Ans: Enthalpy under standard conditions.
Q What is Hess’s law?
Ans: Enthalpy change is independent of path.
Q What is heat capacity?
Ans: Heat required to raise temperature.
Q What is specific heat?
Ans: Heat required per unit mass.
Q What is molar heat capacity?
Ans: Heat required per mole.
Q What is equilibrium?
Ans: State where forward and reverse rates equal.
Q What is ΔH?
Ans: Change in enthalpy.
Q What is ΔG?
Ans: Change in Gibbs free energy.
II. Multiple Choice Questions (MCQs)
Q Thermodynamics deals with:
(a) motion
(b) energy
(c) structure
(d) bonding
Ans: (b)
Q First law states:
(a) energy destroyed
(b) energy conserved
(c) energy lost
(d) none
Ans: (b)
Q System is:
(a) universe
(b) part under study
(c) surroundings
(d) none
Ans: (b)
Q Open system exchanges:
(a) matter only
(b) energy only
(c) both
(d) none
Ans: (c)
Q Closed system exchanges:
(a) matter
(b) energy
(c) both
(d) none
Ans: (b)
Q Isolated system exchanges:
(a) matter
(b) energy
(c) both
(d) none
Ans: (d)
Q Internal energy is:
(a) kinetic only
(b) potential only
(c) total energy
(d) none
Ans: (c)
Q Heat is:
(a) stored energy
(b) transfer energy
(c) mass
(d) none
Ans: (b)
Q Work is:
(a) energy transfer
(b) force
(c) mass
(d) none
Ans: (a)
Q State function depends on:
(a) path
(b) state
(c) both
(d) none
Ans: (b)
Q Path function depends on:
(a) state
(b) path
(c) both
(d) none
Ans: (b)
Q Enthalpy is:
(a) heat content
(b) work
(c) mass
(d) none
Ans: (a)
Q Entropy measures:
(a) energy
(b) randomness
(c) heat
(d) none
Ans: (b)
Q Gibbs free energy is:
(a) unusable energy
(b) useful energy
(c) heat
(d) none
Ans: (b)
Q Exothermic reactions:
(a) absorb heat
(b) release heat
(c) none
(d) both
Ans: (b)
Q Endothermic reactions:
(a) release heat
(b) absorb heat
(c) none
(d) both
Ans: (b)
Q Spontaneous process:
(a) requires energy
(b) natural
(c) forced
(d) none
Ans: (b)
Q Non-spontaneous process:
(a) natural
(b) requires energy
(c) none
(d) both
Ans: (b)
Q Hess’s law states:
(a) path dependent
(b) path independent
(c) energy lost
(d) none
Ans: (b)
Q Heat capacity unit:
(a) J
(b) J/K
(c) K
(d) none
Ans: (b)
Q Specific heat unit:
(a) J/kg
(b) J/kg·K
(c) J/K
(d) none
Ans: (b)
Q ΔH negative means:
(a) endothermic
(b) exothermic
(c) none
(d) both
Ans: (b)
Q ΔG negative means:
(a) non-spontaneous
(b) spontaneous
(c) equilibrium
(d) none
Ans: (b)
Q Entropy increases in:
(a) order
(b) disorder
(c) none
(d) both
Ans: (b)
Q Reversible process is:
(a) fast
(b) slow
(c) none
(d) both
Ans: (b)
Q Irreversible process is:
(a) slow
(b) fast
(c) none
(d) both
Ans: (b)
Q Standard conditions are:
(a) 1 atm, 298 K
(b) 2 atm
(c) 100 K
(d) none
Ans: (a)
Q ΔU represents:
(a) heat
(b) work
(c) internal energy change
(d) none
Ans: (c)
Q Equilibrium means:
(a) no reaction
(b) equal rates
(c) no energy
(d) none
Ans: (b)
Q Assertion: Energy cannot be created or destroyed.
Reason: It can only be transformed.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Ans: (a)
Q Assertion: The entropy of the universe increases.
Reason: Natural processes increase disorder.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Ans: (a)
Q Assertion: ΔG determines spontaneity.
Reason: ΔG includes enthalpy and entropy terms.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Ans: (b)
Q Assertion: Exothermic reactions are always spontaneous.
Reason: They release heat.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Ans: (c)
Q Assertion: State functions depend on path.
Reason: They depend only on initial and final state.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Ans: (d)
Q Assertion: Heat is a state function.
Reason: It depends on path.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Ans: (d)
Q Assertion: Reversible processes are ideal.
Reason: They occur infinitely slowly.
(a) Both A and R are true, and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Ans: (a)
