Question: Consider the reaction, C + O2 CO2 ;ΔH = – 94 kcal. What will be the value of ΔH for the reaction CO2 C + O2 ?
[A].

-94 kcal

[B].

+ 94 kcal

[C].

> 94 kcal

[D].

< -94 kcal

Answer: Option B

Explanation:

No answer description available for this question.

Question: Compound having large heat of formation is
[A].

more stable.

[B].

less stable.

[C].

not at all stable (like nascent O2).

[D].

either more or less stable ; depends on the compound.

Answer: Option A

Explanation:

No answer description available for this question.

Question: The amount of heat required to decompose a compound into its elements is __________ the heat of formation of that compound from its elements.
[A].

less than

[B].

more than

[C].

same as

[D].

not related to

Answer: Option C

Explanation:

No answer description available for this question.

Question: ‘The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture”. This is
[A].

the statement as per Gibbs-Helmholtz

[B].

called Lewis-Randall rule

[C].

Henry’s law

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Fugacity is a measure of the
[A].

escaping tendencies of the same substance in different phases of a system.

[B].

relative volatility of a mixture of two miscible liquids.

[C].

behaviour of ideal gases.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Free energy change of mixing two liquid substances is a function of the
[A].

concentration of the constituents only.

[B].

quantities of the constituents only.

[C].

temperature only.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Entropy change of mixing two liquid substances depends upon the
[A].

molar concentration

[B].

quantity (i.e. number of moles)

[C].

both (a) and (b)

[D].

neither (a) nor (b)

Answer: Option C

Explanation:

No answer description available for this question.

Question: As the temperature is lowered towards the absolute zero, the value of the quantity approaches
[A].

zero

[B].

unity

[C].

infinity

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: At constant temperature and pressure, for one mole of a pure substance, the ratio of the free energy to the chemical potential is
[A].

zero

[B].

one

[C].

infinity

[D].

negative

Answer: Option B

Explanation:

No answer description available for this question.

Question: Gibbs-Duhem equation
[A].

states that n1dμ1 + n2dμ2 + ….njdμj = 0, for a system of definite composition at constant temperature and pressure.

[B].

applies only to binary systems.

[C].

finds no application in gas-liquid equilibria involved in distillation.

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.