Chemical Reaction Engineering

Question: In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will
[A].

remain the same

[B].

be halved

[C].

also be. doubled

[D].

become one fourth

Answer: Option A

Explanation:

No answer description available for this question.

Question: In the reversible reaction of the type, A + B AB, in general
[A].

both forward and backward reactions will be exothermic.

[B].

neither of the reactions will be en-dothermic.

[C].

the combination reaction will be exothermic, while the dissociation reaction will be endothermic.

[D].

the combination reaction will be endothermic, while the dissociation reaction will be exothermic.

Answer: Option C

Explanation:

No answer description available for this question.

Question: In the gaseous phase ammonia formation reaction (N2 + 3H2 2NH3), the value of the equilibrium constant depends on the
[A].

total pressure of the system.

[B].

volume of the reactor.

[C].

temperature.

[D].

initial concentration of N2 and H2.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Calcination reaction of limestone (CaCO3 CaO + CO2) goes to completion in the rotary kiln, because
[A].

CaO is not dissociated.

[B].

CO2 escapes continuously.

[C].

of high calcination temperature.

[D].

CaO is more stable than CaCO3.

Answer: Option B

Explanation:

No answer description available for this question.

Question: The reactions with low activation energy are
[A].

always spantaneous

[B].

slow

[C].

fast

[D].

non-spontaneous

Answer: Option C

Explanation:

No answer description available for this question.

Question: The reactions of high molecularity are rare, because
[A].

of very large activation energy of many bodies.

[B].

of low probability of many body collisions.

[C].

many body collisions are not favoured energetically.

[D].

of requirement of very large concentration for such reactions.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Holding time for flow reactors is __________ the space time, for constant fluid density
[A].

double

[B].

triple

[C].

equal to

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Recycling back of outlet stream to the reactor from an ideal CSTR carrying out a first order liquid phase reaction will result in __________ in conversion.
[A].

decrease

[B].

increase

[C].

no change

[D].

either (a) or (b), depends on the type of reaction

Answer: Option C

Explanation:

No answer description available for this question.

Question: Time required for 50% decomposition of a liquid in an isothermal batch reactor following first order kinetics is 2 minutes. The time required for 75% decomposition will be about __________ minutes.
[A].

3

[B].

4

[C].

6

[D].

8

Answer: Option B

Explanation:

No answer description available for this question.

Question: Kinetics of a catalytic reaction can be best studied on a/an __________ reactor.
[A].

mixed

[B].

integral (plug flow)

[C].

differential (flow)

[D].

either (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.