CBSE Class 11 Chemistry Chapter 6 Thermodynamics MCQs
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CBSE Class 11 Chemistry Chapter 6 Thermodynamics MCQs (SET A)
1. ∆E = 0 for which process
(A) Cyclic process
(B) Isobaric expansion process
(C) Isochoric process
(D) Adiabatic process
Answer: Cyclic process.
2. Out of the following the correct statement is
(A) w is a state function
(B) ∆E = q + w for every thermodynamic
(C) none
(D) ∆E = 0 for every cyclic process
Answer: ∆E = 0 for every cyclic process.
3. The incorrect statement among following is
(A)The substance most be at 25°C When a substance is in its thermodynamics standard state.
(B) Heat capacity at constant pressure is an extensive property
(C) Reversible process can be reversed
(D) Molar internal energy is an intensive property
Answer: The substance must be at 25°C ,When a substance is in its thermodynamics standard state.
4. Find the correct option which is not state a function?
(A) Internal energy
(B) Free energy
(C) Enthalpy
(D)Work
Answer: Work.
5. Find which is an intensive property?
(A) Volume
(B) Free energy
(C) Entropy
(D) Pressure
Answer: Pressure.
CBSE Class 11 Chemistry Chapter 6 Thermodynamics MCQs (SET B)
1. The first law of thermodynamics is represented by the equation
(A) ∆E = Q + W
(B) ∆E = Q – W
(C) ∆E = Q
(D) Q = W – ∆E
Answer: ∆E = Q + W.
2. The net internal energy change in reversible cyclic process is
(A)3/2RT
(B) Zero
(C) Greater than zero \
(D) Less than zero
Answer: Zero.
3. Universe is considered as
(A) Close system
(B) Open system
(C) Isolated system
(D) None of these
Answer: Isolated system.
4. If separate samples of argon, methane, nitrogen, and carbon dioxide, all at the same initial temperature and pressure and expanded adiabatically reversibly to double their original volumes, then which one of these gases will have a temperature at a high level as the final temperature?
(A) Nitrogen
(B) Argon
(C) Methane
(D) Carbon dioxide
Answer: Methane.
5. Adiabatic expansion of ideal gas into vacuum correspond to
(A) w = 0
(B) ∆E = 0
(C) w=1
(D) none
Answer: w = 0.
CBSE Class 11 Chemistry Chapter 6 Thermodynamics MCQs (SET C)
1. Find the work done if , the temperature of 1 mole of a gas is increased by 1ºC at constant pressure.
(A) R
(B) 2R
(C)R/2
(D) 3R
Answer: R.
2. Heat capacity of H2O at its boiling point is
(A) 3cal mol–1 K–1
(B) 5 cal mol–1 K–1
(C) 7 cal mol–1 K–1
(D) Infinite
Answer: Infinite.
3. One mole of ideal gas is allowed to expand adiabatically and reversible from a temperature of 27ºC. If 3KJ is the work done during the process is .Then ,find the final temperature (Cv = 20 JK–1)
(A) 150 K
(B) 100 K
(C) 26.85 K
(D) 295 K
Answer: 150 K.
4. Molar heat capacity of water in equilibrium with ice at constant pressure is
(A) Zero
(B) Infinity
(C) 40.45 kJ K–1 mol–1
(D) 75.48 JK–1mol–1
Answer: Infinity.
5. Heat of combustion of a substance:
(A) Is always positive
(B) Is always negative
(C) Is equal to heat of formation
(D) Nothing can be said without reaction
Answer: Is always negative.
CBSE Class 11 Chemistry Chapter 6 Thermodynamics MCQs (SET D)
1. Which reaction either endothermic or exothermic characteristics has the greater chance of occurring spontaneously?
(A) One is which entropy change is negative
(B) One in which Gibbs energy change is negative
(C) One in which equilibrium has been established
(D) none
Answer: One in which equilibrium has been established.
2. Net work done by the system in a cyclic process is equal to:
(A) Zero
(B) ∆U
(C) ∆H
(D) q
Answer: q.
3. The Gibbs energy change for a reversible reaction at 1 equilibrium is:
(A) Zero
(B) Small positive
(C) Small negative
(D) Large positive
Answer: Zero.
4. A system absorbs 10 kJ of heat and does 4 kJ of work. The internal energy of the system
(A) Increases by 6 kJ
(B) Decreases by 6 kJ
(C) Decreases by 14 kJ
(D) Increases by 14 kJ
Answer: Increases by 6 kJ.
5. During an adiabatic process:
(A) Pressure is maintained constant
(B) Gas is isothermally expanded
(C) There is perfect heat insulation
(D) The system changes heat with surroundings
Answer: There is perfect heat insulation.
CBSE Class 11 Chemistry Chapter 6 Thermodynamics MCQs (SET D)
1. Which of the following statements is true? The entropy of the universe
(A) Increases and tends towards maximum value
(B) Decreases and tends to be zero
(C) Remains constant
(D) None
Answer: Increases and tends towards maximum value.
2. Which of the following is/are extensive properties?
(A) Entropy
(B) Density
(C) Enthalpy
(D) Both (A) and (C)
Answer: Both (A) and (C).
3. Which of the following is path function?
(A) Enthalpy
(B) Heat
(C) Entropy
(D) Gibb’s free energy
Answer: Heat.
4. If x and y are arbitrary extensive variable, then
(A) (x + y) is an intensive variable
(B) 𝑥/𝑦 is intensive variable
(C) (x – y) is intensive variable
(D) (x × y) is intensive variable
Answer: 𝑥/𝑦 is intensive variable.
5. Universe is considered as
(A) Close system
(B) Open system
(C) Isolated system
(D) None of these
Answer: Isolated system.
CBSE Class 11 Chemistry Chapter 6 Thermodynamics MCQs (SET F)
1. The first law of thermodynamics is represented by the equation:
(A) ∆E = Q + W
(B) ∆E = Q – W
(C) ∆E = Q
(D) none
Answer: ∆E = Q + W.
2. A system absorbs 600 J of heat and does work equivalent to 300 J on its surroundings. The change in internal energy is
(A) 200 J
(B) 300 J
(C) 400 J
(D) None
Answer: 300 J.
3. First law of thermodynamics is valid for
(A) All processes
(B) only reversible process
(C) only cyclic process
(D) only cyclic processes that are carried out reversibly
Answer: All processes.
4. Which one of the following equation does not correctly represent the first law of thermodynamics for the given process?
(A) isothermal process: q = –w
(B) cyclic process: q = –w
(C) isochoric process: ∆E = q
(D) adiabatic process: ∆E = –w
Answer: adiabatic process: ∆E = –w.
5. Out of the following the correct statement is:
(A) w is a state function
(B) ∆E = q + w for every thermodynamic system at rest in the absence of external field
(C) None
(D) ∆E = 0 for every cyclic process
Answer: ∆E = 0 for every cyclic process.
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