Chemical Reaction Engineering MCQs

Question 1

From collison theory, the reaction rate constant is proportional to

Accepted Answer

Tm.exp(- E/RT)

Answer

Exp(- E/RT)

Answer

Exp(- E/2RT)

Answer

√T

Question 2

For any reaction, we may write conversion as a function of

Accepted Answer

All of the above

Answer

Time

Answer

Temperature

Answer

Concentration

Question 3

In flow reactors, the performance equations interrelate the rate of reaction to the

Accepted Answer

All of the above

Answer

Feed rate

Answer

Reactor volume

Answer

Extent of reaction

Question 4

The space time is equivalent to the holding time in a steady state mixed reactor for

Accepted Answer

Constant fluid density systems

Answer

Non-isothermal gas reaction

Answer

Variable fluid density systems

Answer

Gas reactions with changing no. of moles

Question 5

For a heterogeneous catalytic reaction

Accepted Answer

Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction

Answer

A relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important

Answer

The catalyst does not form an intermediate complex with the reactant

Answer

The surface of the catalyst does not play an important role during reaction

Question 6

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will

Accepted Answer

Remain the same

Answer

Be halved

Answer

Also be doubled

Answer

Become one fourth

Question 7

The extent of a reaction is

Accepted Answer

All of the above

Answer

Different for reactants and products

Answer

Dimensionless

Answer

Depends on the stoichiometric co-efficient

Question 8

The heat of reaction

Accepted Answer

Is independent of the mechanism of reaction

Answer

Depends on the pressure only

Answer

Depends on the mechanism of reaction only

Answer

Depends on both pressure and mechanism of reaction

Question 9

For a homogeneous reaction of nth order, the dimension of the rate constant is given by

Accepted Answer

$$\frac{{{{\left( {{	ext{concentration}}} ight)}^{1 - {	ext{n}}}}}}{{{	ext{time}}}}$$

Answer

$$\frac{{	ext{L}}}{{{{\left( {{	ext{time}}} ight)}^{	ext{n}}}}}$$

Answer

$$\frac{{{{\left( {{	ext{concentration}}} ight)}^{{	ext{n}} - 1}}}}{{{	ext{time}}}}$$

Answer

None of these