Chemical Engineering

Question: If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.
[A].

film

[B].

ash layer

[C].

pore

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the
[A].

activation energy

[B].

equilibrium constant

[C].

heat of reaction

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: As the chemical reaction proceeds, the rate of reaction
[A].

increases.

[B].

decreases.

[C].

remains same.

[D].

may increase or decrease depending on the type of reaction.

Answer: Option B

Explanation:

No answer description available for this question.

Question: If CA is the quantity of reactants initially present, the quantity left after ‘n’ half periods will be equal to
[A].

[B].

[C].

[D].

(CA)1/2n

Answer: Option B

Explanation:

No answer description available for this question.

Question: A catalyst in a chemical reaction
[A].

decreases the activation energy.

[B].

alters the reaction mechanism.

[C].

increases the frequency of collisions of reacting species.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: A reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.
[A].

catalytic

[B].

autocatalytic

[C].

photochemical

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: An imbalanced chemical reaction equation is against the law of
[A].

multiple proportion

[B].

conservation of mass

[C].

constant proportion

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction.
[A].

less than

[B].

equal to

[C].

more than

[D].

equal to or more than

Answer: Option D

Explanation:

No answer description available for this question.

Question: Participation of __________ is involved in the occurrence of a chemical reaction.
[A].

protons

[B].

neutrons

[C].

electrons

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Collision theory gives the rate constant for bimolecular reaction as
[A].

K α T.e-E/RT

[B].

K α eE/RT

[C].

K α e-E/RT

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.