Thermodynamics Test

Question 1
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Entropy is a measure of degree of randomness. Entropy is directly proportional to temperature. Every system tries to acquire maximum state of randomness or disorder. Entropy is a measure of unavailable energy. Unavailable energy = Entropy × Temperature The ratio of Entropy of Vaporization and boiling point of a substance remains almost constant. Answer the given below questions (i) to (iv).
Q. Which of the following has S = +ve?

A
A. H₂(g) + Cl2 (g) → 2HCl (g)

B
B. Boiling of egg

C
C. Crystallization of Sugar

D
D. Formation of Complex Compound

Question 2
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Entropy is a measure of degree of randomness. Entropy is directly proportional to temperature. Every system tries to acquire maximum state of randomness or disorder. Entropy is a measure of unavailable energy. Unavailable energy = Entropy × Temperature The ratio of Entropy of Vaporization and boiling point of a substance remains almost constant. Answer the given below questions (i) to (iv).
Q. Which of the following has S = – ve?

A
A. Adsorption

B
B. Dissolution of NH₄Cl in water

C
C. H₂ → 2H

D
D. 2NaHCO₃ (s) → Na₂CO₃ + CO₂ + H₂O

Question 3
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Entropy is a measure of degree of randomness. Entropy is directly proportional to temperature. Every system tries to acquire maximum state of randomness or disorder. Entropy is a measure of unavailable energy. Unavailable energy = Entropy × Temperature The ratio of Entropy of Vaporization and boiling point of a substance remains almost constant. Answer the given below questions (i) to (iv).
Q. The sign of D in the reaction, N₂(g) + O₂(g) → 2NO(g) is:

A
A. +ve

B
B. –ve

C
C. Zero

D
D. None of these

Question 4
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Entropy is a measure of degree of randomness. Entropy is directly proportional to temperature. Every system tries to acquire maximum state of randomness or disorder. Entropy is a measure of unavailable energy. Unavailable energy = Entropy × Temperature The ratio of Entropy of Vaporization and boiling point of a substance remains almost constant. Answer the given below questions (i) to (iv).
Q. The law of thermodynamics, which helps to determine absolute Entropy is:

A
A. Zeroth law

B
B. I law

C
C. II law

D
D. III law

Question 5
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that q_p = q_v + n_gRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:
Assertion: Internal energy of a system is an extensive property.
Reason: The internal energy of a system depends upon the physical state and amount of the substance.

A
A. A and R both are correct and R is the correct explanation of A.

B
B. A and R both are correct but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Question 6
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that q_p = q_v + n_gRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:
Assertion: Absolute value of internal energy (U) cannot be determined.
Reason: Internal energy is a sum of many types of energies, that depend on several factors.

A
A. A and R both are correct and R is the correct explanation of A.

B
B. A and R both are correct but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Question 7
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that q_p = q_v + n_gRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:
Assertion: Work and internal energy of a system are state functions.
Reason: The sum of q + w is a state function.

A
A. A and R both are correct and R is the correct explanation of A.

B
B. A and R both are correct but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Question 8
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that q_p = q_v + n_gRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:
Assertion: The increase in energy (U) for the vaporization of one mole in water at 1 atm and 373 K is zero.
Reason: For gaseous isothermal processes, U = 0.

A
A. A and R both are correct and R is the correct explanation of A.

B
B. A and R both are correct but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

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Thermodynamics ...

Question 1

A. H2 (g) + Cl2 (g) → 2HCl (g)

B. Boiling of egg

C. Crystallization of Sugar

D. Formation of Complex Compound

Question 2

A. Adsorption

B. Dissolution of NH4Cl in water

C. H2 → 2H

D. 2NaHCO3 (s) → Na2CO3 + CO2 + H2O

Question 3

A. +ve

B. –ve

C. Zero

D. None of these

Question 4

A. Zeroth law

B. I law

C. II law

D. III law

Question 5

A. A and R both are correct and R is the correct explanation of A.

B. A and R both are correct 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.

Question 6

A. A and R both are correct and R is the correct explanation of A.

B. A and R both are correct 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.

Question 7

A. A and R both are correct and R is the correct explanation of A.

B. A and R both are correct 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.

Question 8

A. A and R both are correct and R is the correct explanation of A.

B. A and R both are correct 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.

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Question Analysis

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A. H₂(g) + Cl2 (g) → 2HCl (g)

B. Dissolution of NH₄Cl in water

C. H₂ → 2H

D. 2NaHCO₃ (s) → Na₂CO₃ + CO₂ + H₂O