Chemical Reaction Engineering

Question 1

Which of the following will give maximum gas conversion?
A. Fixed bed reactor.
B. Fluidized bed reactor.
C. Semi-fluidized bed reactor.
D. Plug-flow catalytic reactor.

Answer 1

C. Semi - Fluidized Bed reactor

Question 2

__________ explains the mechanism of catalysis.

Answer 2

Activated Complex Theory

Question 3

The fractional volume change of the system for the isothermal gas phase
reaction, A → 3B, between no conversion and complete conversion is

Answer 3

2

Question 4

A catalyst:
A. initiates a reaction.
B. lowers the activation energy of reacting molecules.
C. is capable of reacting with any one of the reactants.
D. cannot be recovered chemically unchanged at the end of a chemical
reaction.

Answer 4

B. lowers the activation energy of reacting molecules.

Question 5

What is the order of a chemical reaction, A 2B C k+ ⎯⎯→ , if the
rate of formation of ‘C’, increases by a factor of 2.82 on doubling the
concentration of ‘A’ and increases by a factor of 9 on trebling the concentration
of ‘B’?

Answer 5

7/2

Question 6

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

Answer 6

fluidized bed reactor followed by a fixed

Question 7

For every 10°C rise in temperature, the rate of chemical reaction doubles.
When the temperature is increased from 30 to 70°C, the rate of reaction
increases __________ times.

Answer 7

16

Question 8

The single parameter model proposed for describing non-ideal flow is the
__________ model.
A. tank in series
B. dispersion
C. both (a) & (b)
D. neither (a) nor (b).

Answer 8

C. both (a) & (b)

Question 9

A first order reaction requires two equal sized CSTR. The conversion is

Answer 9

more when they are connected in series.

Question 10

In case of physical adsorption, the heat of adsorption is of the order of
__________ kcal/kg-mole.

Answer 10

100000