Chemical Engineering Thermodynamics MCQs

Question 1

The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the

Accepted Answer

None of these

Answer

Lewis-Randall rule

Answer

Statement of Vant-Hoff equation

Answer

Le-Chatelier's principle

Question 2

Linde gas liquefaction process employs cooling

Accepted Answer

By throttling

Answer

By expansion in an engine

Answer

At constant pressure

Answer

None of these

Question 3

Claude gas liquefaction process employs cooling

Accepted Answer

By expansion in an engine

Answer

At constant pressure

Answer

By throttling

Answer

None of these

Question 4

Air-refrigeration cycle

Accepted Answer

Both B and C

Answer

Is the most efficient of all refrigeration cycles

Answer

Has very low efficiency

Answer

Requires relatively large quantities of air to achieve a significant amount of refrigeration

Question 5

The quantitative effect of temperature on chemical equilibrium is given by the

Accepted Answer

Vant-Hoff equation

Answer

Le-Chatelier's principle

Answer

Arhenius equation

Answer

None of these

Question 6

The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

Accepted Answer

Gibbs-Duhem

Answer

Van Laar

Answer

Gibbs-Helmholtz

Answer

Margules

Question 7

Enthalpy of a gas depends upon its

Accepted Answer

Temperature

Answer

Mass

Answer

Volume

Answer

Pressure

Question 8

The Joule-Thomson co-efficient is defined as $${\left( {\frac{{\partial {	ext{T}}}}{{\partial {	ext{P}}}}} ight)_{	ext{H}}}.$$ Its value at the inversion point is

Accepted Answer

0

Answer

$$\infty $$

Answer

1

Answer

-ve

Question 9

The compressibility factor for an ideal gas is 1. Its value for any other real gas is

Accepted Answer

Either (b) or (c), depends on the nature of the gas

Answer

1

Answer

< 1

Answer

> 1