August 2022

Question: Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is
[A].

1

[B].

4

[C].

2

[D].

3

Answer: Option C

Explanation:

No answer description available for this question.

Question: Entropy of the system decreases, when
[A].

snow melts into water.

[B].

a gas expands spontaneously from high pressure to low pressure.

[C].

water is converted into ice.

[D].

both (b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of
[A].

sublimation

[B].

fusion

[C].

transition

[D].

vaporisation

Answer: Option C

Explanation:

No answer description available for this question.

Question: Joule-Thomson co-efficient which is defined as, , changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is
[A].

0

[B].

∞

[C].

+ve

[D].

-ve

Answer: Option A

Explanation:

No answer description available for this question.

Question: Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
[A].

0

[B].

1

[C].

∞

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.
[A].

decreases

[B].

decreases exponentially

[C].

increases

[D].

remains constant

Answer: Option C

Explanation:

No answer description available for this question.

Question: If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the
[A].

process must be isobaric.

[B].

temperature must decrease.

[C].

process must be adiabatic.

[D].

both (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Consider the process A & B shown in the figure given below In this case, it is possilbe that
[A].

both the processes are adiabatic.

[B].

both the processes are isothermal.

[C].

process A is isothermal while B is adiabatic.

[D].

process A is adiabatic while B is isothermal.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about __________ percent.
[A].

0.25

[B].

0.5

[C].

0.75

[D].

1

Answer: Option B

Explanation:

No answer description available for this question.