Chemical Engineering - Chemical Reaction Engineering

41. 

The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises form 10 to 100°C.

A. 256
B. 512
C. 112
D. 612

Answer: Option B

Explanation:

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42. 

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

A. increases
B. decreases
C. either (a) or (b); depends on the type of catalyst
D. neither (a) nor (b).

Answer: Option C

Explanation:

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43. 

Signal normally used to study non-ideal flow by stimulus response technique is __________ input.

A. pulse
B. step
C. both (a) & (b)
D. neither (a) nor (b).

Answer: Option C

Explanation:

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44. 

When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield.

A. is greater than
B. is smaller than
C. equals
D. can be either greater or smaller than (depends on the type of reaction)

Answer: Option C

Explanation:

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45. 

The half life period of a first order reaction is

A. always the same irrespective of the reaction.
B. independent on initial concentration of the reactants.
C. proportional to the initial concentration of reactants.
D. half the specific rate constant.

Answer: Option B

Explanation:

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