Chemistry Chapter 11 Reactions Kinetics Mcqs Test Online Punjab Class 9th

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Question 1 of 10

Chemistry

1. In a reversible reaction catalyst lowers the activation energy of the

Forward reaction

Reverse reaction

Forward reaction but increases for the reverse reaction

Forward as well as reverse reaction

Question 1 of 10

Question 2 of 10

2. Reactions with high activation energy are usually

Fast

Exothermic

Reversible

Slow

Question 2 of 10

Question 3 of 10

3. Rate law for the reaction R-X + H₂O → R-OH + HX is, rate = k[R-X]. The rate of reaction will be doubled when

Concentration of R-X is reduced to half

Concentration of both R-X and H₂O is doubled

None of these

Concentration of H₂O is doubled

Question 3 of 10

Question 4 of 10

4. If a reaction proceeds in such a way that order of reaction is independent of the reactants concentration, the overall order of reaction would be

First

Zero

Third

Second

Question 4 of 10

Question 5 of 10

5. The rate of a catalyzed reaction is independent of the concentration of

None of these

Reactants

Products

Catalyst

Question 5 of 10

Question 6 of 10

6. The activation energy for a reaction can be

Decreased by increasing concentration of reactants

Increased by decreasing temperature

Increased by increasing temperature

None of these

Question 6 of 10

Question 7 of 10

7. The unit of the rate constant in the same as that of the rate of reaction in ________ order reaction.

Zero

First

Third

Second

Question 7 of 10

Question 8 of 10

8. For the reaction 2A + B → C + D The expression for the rate law is, rate = k[A]², the order of reaction in B is:

None of these

Third

Second

First

Question 8 of 10

Question 9 of 10

9. The rate of a reaction _________ as the reaction proceeds.

Decreases

Increases

May increase or decrease

Remains the same

Question 9 of 10

Question 10 of 10

10. For the reaction 2A + B → C, the rate law for the reaction is

None of these

Rate = k[C]

Rate = k[A][B]

Rate = k[A]²[B]

Question 10 of 10

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