Chemical Reaction Engineering - Section 1

Directions to Solve

Chemical Reaction Engineering - Section 1

The MCQs related to Chemical Reaction Engineering
are available in this section and you can solve the problems to test your skills.

1.

A first order irreversible reaction, A 1-sym-arr B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two reactors.

A.	both conversion as well as concentration are same
B.	conversion in both will be the same but concentrations will be different
C.	both the conversion as well as concentrations will be different
D.	none of these.

Answer: Option B

Explanation:

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

2.

The reason why a catalyst increases the rate of reaction is that, it

A.	decreases the energy barrier for reaction.
B.	increases the activation energy.
C.	decreases the molecular collision diameter.
D.	none of these.

Answer: Option A

Explanation:

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

3.

Pick out the wrong statement.

A.	The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively.
B.	Space time in a flow reactor is a measure of its capacity and is equal to the residence time when the density of reaction mixture is constant.
C.	Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty.
D.	In an ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in logitudinal direction.

Answer: Option C

Explanation:

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

4.

Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N2 + 3H2 doublearr 2NH3.

A.	increases
B.	decreases
C.	remains unchanged
D.	unpredictable from the data

Answer: Option A

Explanation:

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

5.

Sulphuric acid is used as a catalyst in the

A.	hydrogenation of oils.
B.	gas phase oxidation of SO2 in chamber process.
C.	alkylation of hydrocarbons.
D.	none of these.

Answer: Option C

Explanation:

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

6.

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:

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

7.

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:

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

8.

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:

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

1
2
3
4
5
6
7