Chemical Engineering - Chemical Reaction Engineering

11. 

Exposure of a photographic plate to produce a latent image is an example of __________ reaction.

A. very slow
B. very fast
C. photochemical
D. both (b) and (c)

Answer: Option D

Explanation:

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12. 

For identical flow rate, feed composition and for elementary first order reactions, 'N' equal sized mixed reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for constant density systems. This is true, when the value of 'N' is

A. 1
B. >1
C.
D. ≥1

Answer: Option C

Explanation:

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13. 

Helium-mercury method is used for the measurement of the __________ of the catalyst.

A. surface area
B. porosity
C. pore volume
D. both (b) & (c).

Answer: Option D

Explanation:

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14. 

What is the order of a chemical reaction whose rate is deter-mined by the variation of one concentration term only ?

A. zero
B. first
C. second
D. third

Answer: Option B

Explanation:

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15. 

Pick out the wrong statement.

A. Visible radiation provides the necessary activation energy in photochemical reactions.
B. The order and molecularity of a complex reaction may not be the same.
C. For a second order reaction, the slope of the graph/plot between rate and (concentration) is equal to the rate constant (k).
D. Molecularity of the reaction is always a whole number greater than zero.

Answer: Option B

Explanation:

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