Chemical Engineering - Chemical Reaction Engineering

41. 

For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.

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

Answer: Option B

Explanation:

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42. 

Pick out the correct statement.

A. In catalytic reactions, the catalyst reacts with the reactants.
B. A catalyst initiates a chemical reaction.
C. A catalyst lowers the activation energy of the reacting molecules.
D. A catalyst can not be recovered chemi cally unchanged at the end of the chemical reaction.

Answer: Option C

Explanation:

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43. 

The dimensions of rate constant for reaction 3A B are (l/gm mole)/min. Therefore the reaction order is

A. 0
B. 1
C. 2
D. 3

Answer: Option C

Explanation:

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44. 

Pick out the correct statement

A. Reactions with high activation energies are very temperature sensitive.
B. Chemical equilibrium is a static state.
C. A photochemical reaction is catalysed by light.
D. A chemical reaction occurs when the energy of the reacting molecule is less than the activation energy of the reaction.

Answer: Option A

Explanation:

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45. 

If the time required to complete a definite fraction of reaction varies inversely as the concentration of the reactants, then the order of reaction is

A. 0
B. 1
C. 2
D. 3

Answer: Option C

Explanation:

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