Question: Fugacity is most helpful in
[A].

representing actual behaviour of real gases.

[B].

representing actual behaviour of ideal gases.

[C].

the study of chemical equilibria involving gases at atmospheric pressure.

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: For a multicomponent system, the term chemical potential is equivalent to the
[A].

molal concentration difference.

[B].

molar free energy.

[C].

partial molar free energy.

[D].

molar free energy change.

Answer: Option C

Explanation:

No answer description available for this question.

Question: At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be
[A].

more

[B].

less

[C].

same

[D].

more or less ; depending on the system.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Free energy
[A].

decreases in all spontaneous (or irreversible) processes.

[B].

change during a spontaneous process has a negative value.

[C].

remains unchanged in reversible processes carried at constant temperature and pressure.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: For a spontaneous process, free energy
[A].

is zero

[B].

increases

[C].

decreases whereas the entropy increases

[D].

and entropy both decrease

Answer: Option C

Explanation:

No answer description available for this question.

Question: Free energy change at equilibrium is
[A].

zero

[B].

positive

[C].

negative

[D].

indeterminate

Answer: Option A

Explanation:

No answer description available for this question.

Question: Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm).
[A].

Pressure must be kept below 5.2 atm.

[B].

Temperature must be kept above – 57°C.

[C].

Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C.

[D].

Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively.

Answer: Option D

Explanation:

No answer description available for this question.

Question: “When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change.” This is called the
[A].

Le-Chatelier principle.

[B].

Kopp’s rule.

[C].

law of corresponding state.

[D].

Arrehenius hypothesis.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.
[A].

the same

[B].

less than

[C].

greater than

[D].

different than

Answer: Option A

Explanation:

No answer description available for this question.

Question: Work done may be calculated by the expression for __________ processes.
[A].

non-flow reversible

[B].

adiabatic

[C].

both (a) and (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.