Chemical Engineering - Chemical Reaction Engineering

1. 

An isothermal aqueous phase reversible reaction, P R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is

A. 0.80
B. 1.33
C. 1.60
D. 2.67

Answer: Option C

Explanation:

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2. 

Design of heterogeous catalytic reactor involves consideration of __________ steps.

A. only chemical
B. only physical
C. both (a) & (b)
D. neither (a) nor (b)

Answer: Option C

Explanation:

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3. 

A consecutive reaction, , is characterised by

A. maxima in the concentration of A.
B. maxima in the concentration of B.
C. maxima in the concentration of C.
D. high exothermicity.

Answer: Option B

Explanation:

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4. 

What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on ?

A. Litre/mole.second
B. Moles/litre.second
C. Litre/mole
D. Litre/second

Answer: Option A

Explanation:

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5. 

For a fluidised bed reactor, the most suitable/relevant model is a __________ model.

A. tank in series
B. bubbling bed
C. plug flow
D. none of these

Answer: Option B

Explanation:

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