Chemical Engineering - Chemical Reaction Engineering

1. 

When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is

A. > 1
B. < 1
C. 1
D. 0

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

2. 

In an ideal tubular-flow reactor

A. there is no mixing in longitudinal direction.
B. mixing takes place in radial direction.
C. there is a uniform velocity across the radius.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

3. 

At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

A. 1.6
B. 2
C. 2.24
D. 2.5

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

4. 

__________ is the controlling step in a highly temperature sensitive fluid-solid non-catalytic reaction.

A. Gas film diffusion
B. Ash diffusion
C. Chemical reaction
D. none of these

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

5. 

An autothermal reactor is

A. most suitable for a second order reaction.
B. most suitable for a reversible reaction.
C. completely self-supporting in its thermal energy requirements.
D. isothermal in nature.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

1 2 3 4 5 6 7 8 9 10 Next »