Chemical Reaction Engineering MCQs

Question 1

The dispersion number of perfect mixed flow is

Accepted Answer

∞

Answer

0

Answer

> 150

Answer

< 2100

Question 2

Sometimes, batch process is preferred over continuous process, when the product

Accepted Answer

Both A & B

Answer

Quality & yield can not be achieved in continuous processes, because of long residence time

Answer

Sales demand is fluctuating

Answer

Neither A nor B

Question 3

For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.

Accepted Answer

Fluidised bed reactor followed by a fixed

Answer

Fixed

Answer

Fixed bed reactor followed by a fluidised

Answer

Fluidised

Question 4

The rate of the chemical reaction A → B doubles as the concentration of A i.e., CA is doubled. If rate of reaction is proportional to CAn, then what is the value of n for this reaction?

Accepted Answer

1

Answer

0.5

Answer

0

Answer

2

Question 5

Which of the following fixes the volume of a batch reactor for a particular conversion and production rate?

Accepted Answer

Density of mixture

Answer

Operating conditions (e.g. pressure and temperature)

Answer

Rate constant

Answer

None of these

Question 6

The 'E' curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt

Accepted Answer

At the outlet

Answer

At the inlet

Answer

In the reactor

Answer

Averaged over the inlet and outlet

Question 7

The conversion XA and residence time data are collected for zero order liquid phase reaction in a stirred tank reactor. Which of the following will be a straight line?

Accepted Answer

XA Vs τ

Answer

XA Vs ln τ

Answer

$$\frac{{{{	ext{X}}_{	ext{A}}}}}{{1 - {{	ext{X}}_{	ext{A}}}}}$$ Vs τ

Answer

XA(1 - XA) Vs τ

Question 8

The reactions with low activation energy are

Accepted Answer

Fast

Answer

Always spantaneous

Answer

Slow

Answer

Non-spontaneous

Question 9

In case of a/an __________ chemical reaction, conversion increases with the rise in temperature.

Accepted Answer

Reversible endothermic

Answer

Reversible exothermic

Answer

Irreversible exothermic

Answer

Irreversible endothermic