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JEE Chemical Kinetics PYQs with Solutions

42 previous year questions from Chemical Kinetics (JEE Main & Advanced NSEC) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

42 questionsNSECAnswers + solutions

About Chemical Kinetics PYQs

Chemical Kinetics has 42 previous year questions in the Quantrex Academy JEE Main & Advanced NSEC bank. The 42 questions in this list come from Olympiad workbook (42). Each question opens on its own page with the options, the correct answer and the worked solution where available.

Chemical Kinetics questions with solutions

1

For an elementary rearrangement reaction A leftharpoons P , the following data were recorded at 303 K , when [P]_0=0 : Set No. [A]_0 / molL^ -1 Rate of conversion of A/ molL^ -1 ^

Olympiad workbook Solution View → 2

The kinetic data recorded at 278 K for the reaction NH_4 ^ + (a q)+NO_2 ^ - (a q) arrow N_2(g)+2 H_2 O(I) is Set No. [NH_4^ + ] / M [NO_2^ - ] / M Rate of reaction/ M s-1 1 0.24

Olympiad workbook Solution View → 3

The reaction X+Y arrow Z is first order with respect to X and second order with respect to Y . The initial rate of formation of Z=R mol^ - dm^3 ^ -1 when [X]_0 and [Y]_0 are 0.40

Olympiad workbook Solution View → 4

For the reaction 5 Br^ - (aq)+BrO_3^ - (aq)+6 H^ + (aq) arrow 3 Br_2(aq)+3 H_2 O(l) the rate expression was found to be -d [BrO _ 3 ^ - ] / dt=k [Br^ - ] [H^ + ]^2 [BrO _ 3 ^ - ]

Olympiad workbook Solution View → 5

For the reaction N_2+3 H_2 arrow 2 NH_3 , the rate expression is -d [NH_3] / dt=k[H_2][N_2] The correct statement is- I. The reaction is not elementary. II. The reaction is of

Olympiad workbook Solution View → 6

For a gaseous reaction, A+B arrow Products, the energy of activation was found to be 2.27 ~kJ ~mol^ -1 at 273 K . The ratio of the rate constant (k) to the frequency factor (A) at

Olympiad workbook Solution View → 7

A toxic element is to be removed from drinking water by adsorption on activated charcoal. At low concentrations, the rate constant for adsorption is 1.8 × 10^ -5 ~s^ -1 . The time

Olympiad workbook Solution View → 8

About the energy level diagram given below, which of the following statement/s is/are correct? I. The reaction is of two steps and ' R ' is an intermediate II. The reaction is

Olympiad workbook Solution View → 9

Which of the following statement/s is/are correct? I. Half-life is 50 \% of the total time taken for the completion of a reaction II. Collision frequency (Z), which is the number

Olympiad workbook Solution View → 10

Gas phase reactions (i) and (ii) are of first and second order respectively aligned & 2 ~N_2 O_5 arrow 4 NO_2+O_2 … … … (i) & 2 NO+O_2 arrow 2 NO_2 … … … … (ii) aligned Under

Olympiad workbook Solution View → 11

The equilibrium constant K for the reversible reaction A=B is 2 × 10^3 at 350 K . The rate constants of the forward reaction in the presence and absence of a suitable catalyst at

Olympiad workbook Solution View → 12

A chemical reaction is carried out at two different temperatures T_1 and T_2 (T_2>T_1) and also with and without a catalyst. The statement that is correct among the following is

Olympiad workbook Solution View → 13

Urea, CO(NH_2)_2 , decomposes at 90^ ^ ^ ∘ C as CO(NH_2)_2(aq) arrow NH_4 ^ + (aq)+OCN^ - (aq) Experimental data obtained for the reaction is given in the following plot From the

Olympiad workbook Solution View → 14

The following are the concentration vs time plots of the reactants and products represented by the reaction L(~g)+2 M(~g) N(~g)+3 O(~g) The curves that represent M(g) and N(g)

Olympiad workbook Solution View → 15

For an elementary dimerization reaction of the type 2 R arrow R_2 , the value of the steric factor was found to be 2.5 . This indicates that

Olympiad workbook Solution View → 16

Viruses are nonliving complex chemical entities. They undergo inactivation and hence lose the ability to infect a host, with time. Concentration (expressed as 'median tissue

Olympiad workbook Solution View → 17

Initial concentrations of the reactants and the corresponding half-lives for the reaction P+Q arrow R are given below. The rate law for the reaction is Entry [P_0] (mol dm^ -3

Olympiad workbook Solution View → 18

Following is a qualitative plot that can represent kinetic data obtained with a reactant R where [R]_0 and [R] represent the concentrations of R , at t=0 and t=t respectively. ' Y

Olympiad workbook Solution View → 19

The rate constant values for the decay of radioisotopes X and Y , used in radio-medicine are 0.05 ~h^ -1 and 0.025 ~h^ -1 respectively. In a hospital, at a time ' t_0 ' the

Olympiad workbook Solution View → 20

Which of the energy values marked as I,II and III in the following diagram, will change by the addition of a suitable catalyst?

Olympiad workbook Solution View → 21

The rate of the reaction between two reactants X and Y can be expressed as R=k[X]^2[Y] . In an experiment, the initial rate of the reaction was found to be R_1 when the initial

Olympiad workbook Solution View → 22

A toxic element is to be removed from drinking water by adsorption on activated charcoal. At low concentrations, the rate constant for adsorption is 1.8 × 10^ -5 ~s^ -1 . The time

Olympiad workbook Solution View → 23

For the reaction N_2+3 H_2 arrow 2 NH_3 , the rate expression is -d [NH_3] / dt=k[H_2][N_2] The correct statement is- I. The reaction is not elementary. II. The reaction is of

Olympiad workbook Solution View → 24

For an elementary rearrangement reaction A leftharpoons P , the following data were recorded at 303 K , when [P]_0=0 : Set No. [A]_0 / molL^ -1 Rate of conversion of A/ molL^ -1 ^

Olympiad workbook Solution View → 25

The kinetic data recorded at 278 K for the reaction NH_4 ^ + (a q)+NO_2 ^ - (a q) arrow N_2(g)+2 H_2 O(I) is Set No. [NH_4^ + ] / M [NO_2^ - ] / M Rate of reaction/ M s-1 1 0.24

Olympiad workbook Solution View → 26

For a gaseous reaction, A+B arrow Products, the energy of activation was found to be 2.27 ~kJ ~mol^ -1 at 273 K . The ratio of the rate constant (k) to the frequency factor (A) at

Olympiad workbook Solution View → 27

For the reaction 5 Br^ - (aq)+BrO_3^ - (aq)+6 H^ + (aq) arrow 3 Br_2(aq)+3 H_2 O(l) the rate expression was found to be -d [BrO _ 3 ^ - ] / dt=k [Br^ - ] [H^ + ]^2 [BrO _ 3 ^ - ]

Olympiad workbook Solution View → 28

The reaction X+Y arrow Z is first order with respect to X and second order with respect to Y . The initial rate of formation of Z=R mol^ - dm^3 ^ -1 when [X]_0 and [Y]_0 are 0.40

Olympiad workbook Solution View → 29

Which of the energy values marked as I,II and III in the following diagram, will change by the addition of a suitable catalyst?

Olympiad workbook Solution View → 30

The equilibrium constant K for the reversible reaction A=B is 2 × 10^3 at 350 K . The rate constants of the forward reaction in the presence and absence of a suitable catalyst at

Olympiad workbook Solution View → 31

Urea, CO(NH_2)_2 , decomposes at 90^ ^ ^ ∘ C as CO(NH_2)_2(aq) arrow NH_4 ^ + (aq)+OCN^ - (aq) Experimental data obtained for the reaction is given in the following plot From the

Olympiad workbook Solution View → 32

The rate of the reaction between two reactants X and Y can be expressed as R=k[X]^2[Y] . In an experiment, the initial rate of the reaction was found to be R_1 when the initial

Olympiad workbook Solution View → 33

A chemical reaction is carried out at two different temperatures T_1 and T_2 (T_2>T_1) and also with and without a catalyst. The statement that is correct among the following is

Olympiad workbook Solution View → 34

Gas phase reactions (i) and (ii) are of first and second order respectively aligned & 2 ~N_2 O_5 arrow 4 NO_2+O_2 … … … (i) & 2 NO+O_2 arrow 2 NO_2 … … … … (ii) aligned Under

Olympiad workbook Solution View → 35

About the energy level diagram given below, which of the following statement/s is/are correct? I. The reaction is of two steps and ' R ' is an intermediate II. The reaction is

Olympiad workbook Solution View → 36

Which of the following statement/s is/are correct? I. Half-life is 50 \% of the total time taken for the completion of a reaction II. Collision frequency (Z), which is the number

Olympiad workbook Solution View → 37

Viruses are nonliving complex chemical entities. They undergo inactivation and hence lose the ability to infect a host, with time. Concentration (expressed as 'median tissue

Olympiad workbook Solution View → 38

Initial concentrations of the reactants and the corresponding half-lives for the reaction P+Q arrow R are given below. The rate law for the reaction is Entry [P_0] (mol dm^ -3

Olympiad workbook Solution View → 39

Following is a qualitative plot that can represent kinetic data obtained with a reactant R where [R]_0 and [R] represent the concentrations of R , at t=0 and t=t respectively. ' Y

Olympiad workbook Solution View → 40

The following are the concentration vs time plots of the reactants and products represented by the reaction L(~g)+2 M(~g) N(~g)+3 O(~g) The curves that represent M(g) and N(g)

Olympiad workbook Solution View → 41

The rate constant values for the decay of radioisotopes X and Y , used in radio-medicine are 0.05 ~h^ -1 and 0.025 ~h^ -1 respectively. In a hospital, at a time ' t_0 ' the

Olympiad workbook Solution View → 42

For an elementary dimerization reaction of the type 2 R arrow R_2 , the value of the steric factor was found to be 2.5 . This indicates that

Olympiad workbook Solution View →
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Main Chemical Kinetics list

The larger JEE Chemical Kinetics list is under Chemistry (491 questions).

Related JEE NSEC chapters

Some Basic Concepts of Chemistry (60)Electrochemistry (52)Thermodynamics (C) (50)Structure of Atom (50)General Organic Chemistry (44)Chemical Bonding and Molecular Structure (34)Coordination Compounds (33)Hydrocarbons (29)Solid State (22)Ionic Equilibrium (20)Alcohols Phenols and Ethers (19)Solutions (18)

Chemical Kinetics in other exams

NEET Chemical Kinetics (819)BITSAT Chemical Kinetics (33)