Chemical Reaction Engineering MCQs

Question 1

A catalyst in a chemical reaction __________ free energy change in the reaction.

Accepted Answer

Either A or B; depends on the type of catalyst

Answer

Increases

Answer

Decreases

Answer

Neither A nor B

Question 2

The rate of a homogeneous reaction is a function of

Accepted Answer

All of the above

Answer

Temperature and pressure only

Answer

Temperature and composition only

Answer

Pressure and composition only

Question 3

Space time equals the mean residence time

Accepted Answer

When the density of the reaction mixture is constant

Answer

For large diameter tubular reactor

Answer

For narrow diameter tubular reactor

Answer

For CSTR

Question 4

An imbalanced chemical reaction equation is against the law of

Accepted Answer

Conservation of mass

Answer

Multiple proportion

Answer

Constant proportion

Answer

None of these

Question 5

Reverse reaction in a chemical equilibrium is favoured by the

Accepted Answer

Increase in the concentration of oneof the products

Answer

Removal of one of the products regularly

Answer

Increase in the concentration of one of the reactants

Answer

None of these

Question 6

For an isothermal second order aqueous phase reaction, A → B, the ratio of the time required for 90% conversion to the time required for 45% conversion is

Accepted Answer

11

Answer

2

Answer

4

Answer

22

Question 7

A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A → B. Assume the heat of reaction is - 1kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50J/mole.K. The temperature rise after a conversion of 0.5 will be

Accepted Answer

10°C

Answer

5°C

Answer

20°C

Answer

100°C

Question 8

Carrier in a catalyst increases its

Accepted Answer

Surface area

Answer

Activity

Answer

Performance

Answer

None of these

Question 9

The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is

Accepted Answer

2

Answer

0

Answer

1

Answer

3