Match the items of Column I and Column II. Column I Column II (i) Diamond (a) short interval of time (ii) Instantaneous rate (b) ordinarily rate of conversion is imperceptible (iii) Average rate (c) long duration of time

(i) Rate of conversion of diamond is imperceptible because it requires high activation energy. Diamond cannot be converted into graphite under ordinary condition. (ii) Instantaneous rate of a reaction is rate of a reaction at a particular moment of time. Instantaneous rate of reaction complete at very short span of time. (iii) Average rate is obtained by dividing the change in concentration of any one of the reactant or product by the time taken for the change i.e. ∆ x ∆ t . Average rate of reaction occurs to a long duration of time. Column I Column II (i)Diamond (b)ordinarily rate of conversion is imperceptible (ii)Instantaneous rate (a)short interval of time (iii)Average rate (c)Long duration of time

Match the items of Column I and Column II. Column I Column II (i) Mathematical expression for the rate of reaction (a) rate constant (ii) Rate of reaction for the zero-order reaction is equal to (b) rate law (iii) Units of rate constant for the zero-order reaction is same as that of (c) order of slowest step (iv) Order of a complex reaction is determined by (d) rate of a reaction

(i) Mathematical expressions for rate of a reaction can be given by rate law. It can be written by the known concentrations. (ii) Rate for zero order reaction: rate = k reactant 0 = k rate constant (iii) It is very clear from above that unit of rate constant = rate of the reaction. (iv) Order of a complex reaction is determined by the slowest step which is known as rate determining step. Column I Column II (i) Mathematical expression for the rate of reaction (b) rate law (ii) Rate of reaction for the zero-order reaction is equal to (a) rate constant (iii) Units of rate constant for the zero-order reaction is same as that of (d) rate of reaction (iv) Order of a complex reaction is determined by (c) Order of slowest step

EASY

12th CBSE

IMPORTANT

Earn 100

Why can’t molecularity of any reaction be equal to zero?

Important Questions on Chemical Kinetics

EASY

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 4 - Chemical Kinetics>Short Answer Type>Q 51

Why molecularity is applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?

EASY

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 4 - Chemical Kinetics>Short Answer Type>Q 52

Why can we not determine the order of a reaction by taking into consideration the balanced chemical equation?

MEDIUM

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 4 - Chemical Kinetics>Matching Type>Q 53

Match the graph given in Column I with the order of reaction given in Column II. More than one item in Column I may link to the same item of Column II.

Column I	Column II
(i)
(ii)	(a) Ist order
(iii)	(b) Zero order
(iv)

MEDIUM

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 4 - Chemical Kinetics>Matching Type>Q 55

Match the items of Column I and Column II.

Column I	Column II
(i) Diamond	(a) short interval of time
(ii) Instantaneous rate	(b) ordinarily rate of conversion is imperceptible
(iii) Average rate	(c) long duration of time

MEDIUM

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 4 - Chemical Kinetics>Matching Type>Q 56

Match the items of Column I and Column II.

Column I	Column II
(i) Mathematical expression for the rate of reaction	(a) rate constant
(ii) Rate of reaction for the zero-order reaction is equal to	(b) rate law
(iii) Units of rate constant for the zero-order reaction is same as that of	(c) order of slowest step
(iv) Order of a complex reaction is determined by	(d) rate of a reaction

HARD

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 4 - Chemical Kinetics>Long Answer Type>Q 62

All energetically effective collisions do not result in a chemical change. Explain with the help of an example.

MEDIUM

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 4 - Chemical Kinetics>Long Answer Type>Q 64

Describe how does the enthalpy of reaction remain unchanged when a catalyst is used in the reaction.

MEDIUM

12th CBSE

IMPORTANT

NCERT Exemplar Chemistry - Class 12>Chapter 4 - Chemical Kinetics>Long Answer Type>Q 65

Explain the difference between instantaneous rate of a reaction and average rate of a reaction.

Why can’t molecularity of any reaction be equal to zero?

Important Questions on Chemical Kinetics

Learn and Prepare for any exam you want !