Chemical Kinetics - Online Test
Q1. The unit of rate constant for a first order reaction is
Answer : Option C
Explaination / Solution:
Unit of k = mol L−1s−1/ mol L−1
Q2. Reaction which takes place in one step is known as
Answer : Option C
Explaination / Solution:
Elementary reaction are one step reactions.
Q3. Which among the following statement is not true for rate constant of a reaction?
Answer : Option B
Explaination / Solution:
Rate constant is independent of concentration of reactant.
Q4. Which among the following is an example of pseudo first order reaction?
Answer : Option C
Explaination / Solution:
In acid catalysed hydrolysis of ethylacetate the water is in excess so it is pseudo 1st order reaction, as cincentraton does not change.
Q5. Which among the following is an example of first order reaction?
Answer : Option A
Explaination / Solution:
Decomposition of is 1st order reaction.
Q6. Which among the following is an example of photochemistry used in our daily life?
Answer : Option B
Explaination / Solution:
Photography is an example of photochemistry used in our daily life. Reaction takes place in the presence of light
Q7. The ionic reactions are generally very fast because
Answer : Option B
Explaination / Solution:
Ionic reactions does not involve bond breaking therefore they are fast.
Q8.
In the catalyzed decomposition of benzene diazonium chloride,
Half life period is found to be independent of the initial concentration of the reactant. After 10 min, the volume of gas collected is 10 L and after the reaction is complete, it is 50 L. Hence, the rate constant of the reaction(in min ) is
Half life period is found to be independent of the initial concentration of the reactant. After 10 min, the volume of gas collected is 10 L and after the reaction is complete, it is 50 L. Hence, the rate constant of the reaction(in min ) is
Answer : Option C
Explaination / Solution:
Q9. The rate constant of the reaction at temperature 200 K is 10 times less than the rate constant at 400 K. The activation energy of the reaction is
Answer : Option C
Explaination / Solution:
Q10. The minimum amount of energy required by the reacting molecules at the time of collisions in order to produce effective collisions is called
Answer : Option B
Explaination / Solution:
The minimum amount of energy required by the reacting molecules at the time of collisions in order to produce effective collisions is called threshold energy.
