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Question: For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times.
[A].

8

[B].

12

[C].

16

[D].

32

Answer: Option C

Explanation:

No answer description available for this question.

Question: In case of calcination of limestone, CaCO3 CaO + CO2, the addition of more of CaO will result in __________ in the concentration of CO2.
[A].

no change

[B].

increase

[C].

decrease

[D].

unpredictable from the data

Answer: Option A

Explanation:

No answer description available for this question.

Question: For a __________ order reaction, the units of rate constant and rate of reaction are the same.
[A].

zero

[B].

first

[C].

second

[D].

fractional

Answer: Option A

Explanation:

No answer description available for this question.

Question: A back mix reactor is
[A].

suitable for gas phase reactions.

[B].

ideal at very low conversion.

[C].

same as plug flow reactor (PFR).

[D].

same as ideal stirred tank reactor.

Answer: Option D

Explanation:

No answer description available for this question.

Question: A batch reactor is suitable for
[A].

achieving cent percent conversion of reactants into products.

[B].

large scale gaseous phase reactions.

[C].

liquid phase reactions.

[D].

obtaining uniform polymerisation products in highly exothermic reactions.

Answer: Option C

Explanation:

No answer description available for this question.

Question: According to the ‘law of mass action’, the rate of reaction is directly proportional to the
[A].

equilibrium constant.

[B].

volume of the reaction vessel.

[C].

nature of the reactants.

[D].

molar concentration of the reactants.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Enzymes are destroyed, when the
[A].

temperature is very high,

[B].

reactant’s concentration is very high.

[C].

reactant’s concentration is very low.

[D].

reaction rate is independent of the reactant’s concentration.

Answer: Option A

Explanation:

No answer description available for this question.

Question: In case of a/an __________ chemical reaction, conversion increases with the rise in temperature.
[A].

reversible exothermic

[B].

irreversible exothermic

[C].

irreversible endothermic

[D].

reversible endothermic

Answer: Option D

Explanation:

No answer description available for this question.

Question: Overall rate of reaction in a heterogenous catalytic reaction depends upon the mass and energy transfer from the fluid to solid surface and its rate of reaction is usually __________ the concentration of catalyst, if it does not entail a chain mechanism.
[A].

proportional to

[B].

independent of

[C].

inversely proportional to

[D].

proportional to the square of

Answer: Option A

Explanation:

No answer description available for this question.