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JEE Chemical Kinetics PYQs with Solutions

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

491 questionsChemistry2006–2026Answers + solutions

About Chemical Kinetics PYQs

Chemical Kinetics has 491 previous year questions in the Quantrex Academy JEE Main & Advanced Chemistry bank. The 220 questions in this list come from JEE Main (184) and JEE Advanced (36), spanning 2006 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2026: 27
  • 2025: 26
  • 2024: 21
  • 2023: 26
  • 2022: 23
  • 2021: 27
  • 2020: 17
  • 2019: 20
  • 2018: 7
  • 2017: 4
  • 2016: 4
  • 2015: 2

Chemical Kinetics questions with solutions

1

For a reversible reaction R leftharpoons P , at constant temperature, both the forward and the backward reactions are first order elementary reactions with rate constants k_f and

JEE Advanced 2026 Solution View → 2

For a first-order reaction R P at a given temperature, k is the rate constant. For this reaction, at the given temperature, the concentrations of R and P at a time t are [R] and

JEE Advanced 2026 Solution View → 3

Given below are two statements: R=8.314 J K ^ -1 mol ^ -1 and 1 cal =4.2 J Statement I: When E_a=12.6 kcal/mol, the room temperature rate constant is doubled by a 10\,^∘ C

JEE Main 2026 Solution View → 4

Decomposition of a hydrocarbon follows the equation k = (5.5 × 10^ 11 \,s^ -1 )\,e^ -28000\,K T . The activation energy of reaction is __________ kJ mol ^ -1 . (Nearest Integer)

JEE Main 2026 Solution View → 5

For a reaction A arrow P at T K , the half life (t_ 1/2 ) is plotted as a function of initial concentration [A]_0 of A as given below. The value of x in the given figure is

JEE Main 2026 Solution View → 6

First order gas phase reaction A arrow B + C p_i = initial pressure of gas A, p_t = total pressure of the reaction mixture at time t Expression of rate constant ( k ) is

JEE Main 2026 Solution View → 7

If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99 % of the reaction will be _____ minutes. (Given : 2 = 0.3010 )

JEE Main 2026 Solution View → 8

Consider the given graph showing variation of reactant concentration with time. Three different reactions were started with identical initial concentration of reactants. Which of

JEE Main 2026 Solution View → 9

For a first order reaction A arrow B t/min [A]/M 0 0.6500 x 0.0650 20 0.00065 x= ______ min. (Nearest integer)

JEE Main 2026 Solution View → 10

Consider the first order reaction R arrow P . The fraction of molecules decomposed in the given first order reaction can be expressed as

JEE Main 2026 Solution View → 11

Consider the reaction aX arrow bY , for which the rate constant at 30°C is 1 × 10^ -3 mol ^ -1 L s ^ -1 . Which of the following statements are true? A. When concentration of 'X'

JEE Main 2026 Solution View → 12

Consider the following gas phase reaction being carried out in a closed vessel at 25°C . 2A(g) arrow 4B(g) + C(g) time (min) total pressure of the system (mm Hg) 30 300 ∞ 600 The

JEE Main 2026 Solution View → 13

t_ 100\% is the time required for the 100\% completion of the reaction while t_ 1/2 is the time required for 50\% of the reaction to be completed. Which of the following option

JEE Main 2026 Solution View → 14

For reaction A arrow P , rate constant k = 1.5 × 10^3 s ^ -1 at 27° C. If activation energy for the above reaction is 60 kJ mol ^ -1 , then the temperature (in ° C) at which rate

JEE Main 2026 Solution View → 15

A B (first reaction) C D (second reaction) Consider the above two first-order reactions. The rate constant for first reaction at 500 K is double of the same at 300 K. At 500 ~K

JEE Main 2026 Solution View → 16

An organic compound undergoes first order decomposition. The time taken for decomposition to ((1)/(8))^ th and ((1)/(10))^ th of its initial concentration are t_ 1 / 8 and t_ 1 /

JEE Main 2026 Solution View → 17

The half-life of ^ 65 Zn is 245 days. After x days, 75 \% of original activity remained. The value of x in days is \_\_\_\_ . (Nearest integer) (Given: 3=0.4771 and 2=0.3010 )

JEE Main 2026 Solution View → 18

At 27^ ∘ C in presence of a catalyst, activation energy of a reaction is lowered by 10 kJ mol^ -1 . The logarithm of ratio of k (catalysed) k (uncatalysed) is.... (Consider that

JEE Main 2026 Solution View → 19

Given above is the concentration vs time plot for a dissociation reaction : A arrow nB . Based on the data of the initial phase of the reaction (initial 10 min), the value of n is

JEE Main 2026 Solution View → 20

Observe the following reactions at T(K) . I. A arrow products. II. 5 Br^ - (aq)+BrO_ 3 ^ - (aq)+6 H^ + (aq) arrow 3 Br_ 2 (aq)+3 H_ 2 O(l) Both the reactions are started at 10.00

JEE Main 2026 Solution View → 21

For the thermal decomposition of reactant AB(g) , the following plot is constructed. The half life of the reaction is ' x^ . x= \_\_\_\_ min. (Nearest integer)

JEE Main 2026 Solution View → 22

Correct statements regarding Arrhenius equation among the following are : A. Factor e^ -E a / R T corresponds to fraction of molecules having kinetic energy less than Ea. B. At a

JEE Main 2026 Solution View → 23

Consider A k_ 1 ~B and C k_ 2 D are two reactions. If the rate constant (k_ 1 ) of the A B reaction can be expressed by the following equation _ 10 k=14.34- 1.5 × 10^ 4 ~T / K and

JEE Main 2026 Solution View → 24

A arrow product (First order reaction). Three sets of experiment were performed for a reaction under similar experimental conditions: Run 1 ⇒ 100 ~mL of 10 M solution of reactant

JEE Main 2026 Solution View → 25

The temperature at which the rate constants of the given below two gaseous reactions become equal is \_\_\_\_ K. (Nearest integer) X Y k_ 1 =10^ 6 e^ -30000 ~T P Q k_ 2 =10^ 4 e^

JEE Main 2026 Solution View → 26

Decomposition of A is a first order reaction at T(K) and is given by A(g) B(g)+C(g) . In a closed 1 L vessel, 1 bar A(g) is allowed to decompose at T(K) . After 100 minutes, the

JEE Main 2026 Solution View → 27

Pre-exponential factors of two different reactions of same order are identical. Let activation energy of first reaction exceeds the activation energy of second reaction by 20 ~kJ

JEE Main 2026 Solution View → 28

Consider a reaction A+R arrow Product. The rate of this reaction is measured to be k[A][R] . At the start of the reaction, the concentration of R,[R]_0 , is 10 -times the

JEE Advanced 2025 Solution View → 29

In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eighth of its initial concentration are t_1 and t_2(s)

JEE Main 2025 Solution View → 30

A(g) arrow B(g)+C(g) is a first order reaction. Time T ∞ P_ system P_ t P_ ∞ The reaction was started with reactant A only. Which of the following expression is correct for rate

JEE Main 2025 Solution View → 31

Reaction A(g) arrow 2 ~B(~g)+C(g) is a first order reaction. It was started with pure A Which of the following option is incorrect ?

JEE Main 2025 Solution View → 32

A person's wound was exposed to some bacteria and then bacteria growth started to happen at the same place. The wound was later treated with some antibacterial medicine and the

JEE Main 2025 Solution View → 33

Half life of zero order reaction A arrow product is 1 hour, when initial concentration of reaction is 2.0 ~mol ~L ~L^ -1 . The time required to decrease concentration of A from

JEE Main 2025 Solution View → 34

Consider the following plots of log of rate constant k( k) vs 1 ~T for three different reactions. The correct order of activation energies of these reactions is

JEE Main 2025 Solution View → 35

Rate law for a reaction between A and B is given by R=k[~A]^ n [~B]^ m If concentration of A is doubled and concentration of B is halved from their initial value, the ratio of new

JEE Main 2025 Solution View → 36

For A_2+B_2 leftharpoons 2 AB E_ a for forward and backward reaction are 180 and 200 ~kJ ~mol^ -1 respectively If catalyst lowers E_ a for both reaction by 100 ~kJ ~mol^ -1 .

JEE Main 2025 Solution View → 37

Consider the following statements related to temperature dependence of rate constants. Identify the correct statements, A. The Arrhenius equation holds true only for an elementary

JEE Main 2025 Solution View → 38

In a reaction A+B arrow C , initial concentrations of A and B are related as [A]_0=8[B]_0 . The half lives of A and B are 10 min and 40 min. respectively. If they start to

JEE Main 2025 Solution View → 39

For the reaction A arrow B the following graph was obtained. The time required (in seconds) for the concentration of A to reduce to 2.5 ~g ~L^ -1 (if the initial concentration of

JEE Main 2025 Solution View → 40

Reactant A converts to product D through the given mechanism (with the net evolution of heat) : A arrow B slow ; Δ H=+ve B arrow C fast; Δ H=-ve C arrow D fast ; Δ H=-ve Which of

JEE Main 2025 Solution View → 41

For the reaction \( A arrow \) products. The concentration of A at 10 minutes is _______ \( × 10^ -3 ~mol ~L^ -1 \) (nearest integer). The reaction was started with \(2.5 ~mol ~L^

JEE Main 2025 Solution View → 42

Drug X becomes ineffective after 50 \% decomposition. The original concentration of drug in a bottle was 16 mg / mL which becomes 4 mg / mL in 12 months. The expiry time of the

JEE Main 2025 Solution View → 43

The reaction \(A_2+B_2 arrow 2 AB\) follows the mechanism <img src='data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAd4AAAEbCAYAAAB0u+XEAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcE

JEE Main 2025 Solution View → 44

For bacterial growth in a cell culture, growth law is very similar to the law of radioactive decay. Which of the following graphs is most suitable to represent bacterial colony

JEE Main 2025 Solution View → 45

Consider an elementary reaction A(g)+B(g) arrow C(g)+D(g) If the volume of reaction mixture is suddenly reduced to (1)/(3) of its initial volume, the reaction rate will become ' x

JEE Main 2025 Solution View → 46

For a given reaction R arrow P, t_ 1 / 2 is related to [A]_0 as given in table. Given: 2=0.30 Which of the following is true? A. The order of the reaction is 1 / 2 . B. If [A]_0

JEE Main 2025 Solution View → 47

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

JEE Main 2025 Solution View → 48

Consider a complex reaction taking place in three steps with rate constants k_1, k_2 and k_3 respectively. The overall rate constant k is given by the expression k= (k_1

JEE Main 2025 Solution View → 49

Which of the following graphs most appropriately represents a zero order reaction ?

JEE Main 2025 Solution View → 50

For the thermal decomposition of N_2 O_5( g) at constant volume, the following table can be formed, for the reaction mentioned below. 2 N_2 O_5( g) arrow 2 N_2 O_4( g)+O_2( g) x=…

JEE Main 2025 Solution View → 51

Consider the given figure and choose the correct option :

JEE Main 2025 Solution View → 52

Which of the following statement is not true for radioactive decay?

JEE Main 2025 Solution View → 53

A arrow ~B The molecule A changes into its isomeric form B by following a first order kinetics at a temperature of 1000 K . If the energy barrier with respect to reactant energy

JEE Main 2025 Solution View → 54

A sample initially contains only U-238 isotope of uranium. With time, some of the U-238 radioactively decays into Pb-206 while the rest of it remains undisintegrated. When the age

JEE Advanced 2024 Solution View → 55

Consider the following reaction, 2 H_2(~g)+2 NO(g) arrow N_2(~g)+2 H_2 O(g) which follows the mechanism given below: 2 NO(g) k_1 k_ -1 leftharpoons N_2 O_2(~g) (fast equlibrium)

JEE Advanced 2024 Solution View → 56

Consider the following first order gas phase reaction at constant temperature \( A(g) arrow 2 ~B(~g)+C(g) \) If the total pressure of the gases is found to be 200 torr after \(23

JEE Main 2024 Solution View → 57

Given below are two statements : Statement I: The rate law for the reaction \(A+B arrow C\) is rate \((r)=k[A]^2[B]\). When the concentration of both A and B is doubled, the

JEE Main 2024 Solution View → 58

For a reaction \(A K_1 ~B K_2 C\) If the rate of formation of \(B\) is set to be zero then the concentration of \(B\) is given by :

JEE Main 2024 Solution View → 59

Consider the following reaction \[ A+B arrow C \] The time taken for \(A\) to become \(1 / 4^ th \) of its initial concentration is twice the time taken to become \(1 / 2\) of the

JEE Main 2024 Solution View → 60

Time required for \(99.9 \%\) completion of a first order reaction is _______ times the time required for completion of \(90 \%\) reaction.(nearest integer)

JEE Main 2024 Solution View → 61

Consider the following single step reaction in gas phase at constant temperature. \(2 ~A_ (g) +B_ (g) arrow C_ (g) \) The initial rate of the reaction is recorded as \( r _ 1 \)

JEE Main 2024 Solution View → 62

During Kinetic study of reaction \(2 A+B arrow C+D\), the following results were obtained : \( array llll & A [M] & B [M] & initial rate of formation of D I & 0.1 & 0.1 & 6.0 ×

JEE Main 2024 Solution View → 63

Consider the following reaction, the rate expression of which is given below \[ aligned & A+B arrow C & rate =k[A]^ 1 / 2 [ B]^ 1 / 2 aligned \] The reaction is initiated by

JEE Main 2024 Solution View → 64

Consider the following transformation involving first order elementary reaction in each step at constant temperature as shown below. \(A+B Step 3 Step 1 C Step 2 P\) Some details

JEE Main 2024 Solution View → 65

The following data were obtained during the first order thermal decomposition of a gas A at constant volume: A(g) → 2B(g) + C(g) S. No Time/s Total pressure/(atm) 1 . 0 0 . 1 2 .

JEE Main 2024 Solution View → 66

The ratio of (C 14)/(C 12) in a piece of wood is (1)/(8) part that of atmosphere. If half life of C 14 is 5730 years, the age of wood sample is ..... years.

JEE Main 2024 Solution View → 67

r = k[A] for a reaction, 50 % of A is decomposed in 120 minutes. The time taken for 90 % decomposition of A is ______ minutes.

JEE Main 2024 Solution View → 68

Integrated rate law equation for a first order gas phase reaction is given by (where P _ i is initial pressure and P _ t is total pressure at time t )

JEE Main 2024 Solution View → 69

NO _ 2 required for a reaction is produced by decomposition of N _ 2 O _ 5 in CCl _ 4 as by equation 2 N _ 2 O _ 5 ( g ) → 4 NO _ 2 ( g ) + O _ 2 ( g ) The initial concentration

JEE Main 2024 Solution View → 70

The rate of first order reaction is 0 . 04mol L ^ - 1 s ^ - 1 at 10 minutes and 0 . 03mol L ^ - 1 s ^ - 1 at 20 minutes after initiation. Half life of the reaction is ______

JEE Main 2024 Solution View → 71

The half-life of radioisotopic bromine - 82 is 36 hours. The fraction which remains after one day is _________ × 10 ^ - 2 . (Given antilog 0 . 2006 = 1 . 587 ) Round off to the

JEE Main 2024 Solution View → 72

For a reaction taking place in three steps at same temperature, overall rate constant K = K _ 1 K _ 2 K _ 3 . If Ea _ 1 , Ea _ 2 and Ea _ 3 are 40, 50 and 60kJ / mol respectively

JEE Main 2024 Solution View → 73

Time required for completion of 99 . 9 % of first order reaction is ________ times of half life ( t _ 1 / 2 ) of the reaction

JEE Main 2024 Solution View → 74

Consider the following data for the given reaction 2 HI _ ( g ) → H _ 2 ( g ) + I _ 2 ( g ) cases HI( molL ^ - 1 ) & 0 . 005 & 0 . 01 & 0 . 02 cases Rate ( molL ^ - 1 s ^ - 1 )7 .

JEE Main 2024 Solution View → 75

The plot of logk _ f versus (1)/(T) for a reversible reaction A ( g ) ⇌ P ( g ) is shown. Pre-exponential factors for the forward and backward reactions are 10 ^ 15 s ^ - 1 and 10

JEE Advanced 2023 Solution View → 76

For a reversible reaction A ⇌ B , the ∆ H forward reaction = 20kJ mol ^ – 1 . The activation energy of the uncatalyzed forward reaction is 300kJ mol ^ – 1 . When the reaction is

JEE Main 2023 Solution View → 77

A ( g ) → 2B ( g ) + C ( g ) is a first order reaction. The initial pressure of the system was found to be 800mmHg which increased to 1600mmHg after 10min . The total pressure of

JEE Main 2023 Solution View → 78

t _ 87 . 5 is the time required for the reaction to undergo 87 . 5 % completion and t _ 50 is the time required for the reaction to undergo 50 % completion. The relation between t

JEE Main 2023 Solution View → 79

The reaction 2NO + Br _ 2 → 2NOBr takes place through the mechanism given below NO + Br _ 2 ⇌ NOBr _ 2 (fast) NOBr _ 2 + NO → 2NOBr(slow) The overall order of the reaction is

JEE Main 2023 Solution View → 80

For a chemical reaction A + B → Product, the order is 1 with respect to A and B . Rate mol L ^ - 1 S ^ - 1 [A] mol L ^ - 1 [B] mol L ^ - 1 0 . 10 20 0 . 5 0 . 40 x 0 . 5 0 . 80 40

JEE Main 2023 Solution View → 81

KClO _ 3 + 6 FeSO _ 4 + 3 H _ 2 SO _ 4 → KCl + 3 Fe _ 2 ( SO _ 4 ) _ 3 + 3 H _ 2 O The above reaction was studied at 300K by monitoring the concentration of FeSO _ 4 in which

JEE Main 2023 Solution View → 82

The number of incorrect statement/s from the following is ______________ A. The successive half lives of zero order reactions decreases with time. B. A substance appearing as

JEE Main 2023 Solution View → 83

A molecule undergoes two independent first order reactions whose respective half lives are 12min and 3min . If both the reactions are occurring then the time taken for the 50 %

JEE Main 2023 Solution View → 84

The correct reaction profile diagram for a positive catalyst reaction.

JEE Main 2023 Solution View → 85

The number of given statement/s which is/are correct is_____ (A) The stronger the temperature dependence of the rate constant, the higher is the activation energy. (B) If a

JEE Main 2023 Solution View → 86

Consider the following reaction that goes from A to B in three steps as shown below: Choose the correct option Number of Intermediates Number of Activated Complexes Rate

JEE Main 2023 Solution View → 87

For the adsorption of hydrogen on platinum, the activation energy is 30kJ mol ^ – 1 and for the adsorption of hydrogen on nickel, the activation energy is 41 . 4kJ mol ^ – 1 . The

JEE Main 2023 Solution View → 88

The graph which represents the following reaction is: ( C _ 6 H _ 5 ) _ 3 C - Cl OH ^ - Pyridine ( C _ 6 H _ 5 ) _ 3 C - OH

JEE Main 2023 Solution View → 89

A → B The above reaction is of zero order. Half life of this reaction is 50min . The time taken for the concentration of A to reduce to one-fourth of its initial value is min .

JEE Main 2023 Solution View → 90

A and B are two substances undergoing radioactive decay in a container. The half life of A is 15min and that of B is 5min . If the initial concentration of B is 4 times that of A

JEE Main 2023 Solution View → 91

The rate constant for a first order reaction is 20 min ^ - 1 . The time required for the initial concentration of the reactant to reduce to its (1)/(32) level is ______ × 10 ^ - 2

JEE Main 2023 Solution View → 92

A → B The rate constants of the above reaction at 200K and 300K are 0 . 03 min ^ - 1 and 0 . 05 min ^ - 1 respectively. The activation energy for the reaction is J (Nearest

JEE Main 2023 Solution View → 93

An organic compound undergoes first order decomposition. If the time taken for the 60 % decomposition is 540s , then the time required for 90 % decomposition will be is _____ s.

JEE Main 2023 Solution View → 94

If compound A reacts with B following first order kinetics with rate constant 2 . 011 × 10 ^ - 3 s ^ - 1 . The time taken by A (in seconds) to reduce from 7g to 2g will be _____ .

JEE Main 2023 Solution View → 95

For conversion of compound A → B , the rate constant of the reaction was found to be 4 . 6 × 10 ^ - 5 Lmol - 1 s ^ - 1 . The order of the reaction is _____ .

JEE Main 2023 Solution View → 96

For certain chemical reaction X → Y , the rate of formation of product is plotted against the time as shown in the figure. The number of Correct statement/s from the following is

JEE Main 2023 Solution View → 97

A first order reaction has the rate constant, k = 4 . 6 × 10 ^ - 3 s ^ - 1 . The number of correct statement/s from the following is/are Given: log3 = 0 . 48 . A. Reaction

JEE Main 2023 Solution View → 98

For the first order reaction A → B the half life is 30min . The time taken for 75 % completion of the reaction is mm. (Nearest integer) Given : log2 = 0 . 3010 log3 = 0 . 4771

JEE Main 2023 Solution View → 99

A student has studied the decomposition of a gas A B _ 3 at 25 ° C . He obtained the following data p ( mmHg ) 50 100 200 400 Relative t(1)/(2)(s) 4 2 1 0 . 5 The order of the

JEE Main 2023 Solution View → 100

The number of correct statement/s from the following is _____ . A.Larger the activation energy, smaller is the value of the rate constant. B. The higher is the activation energy

JEE Main 2023 Solution View → 101

Match the rate expressions in LIST-I for the decomposition of \(X\) with the corresponding profiles provided in LIST-II. \(X_s\) and \(k\) are constants having appropriate units.

JEE Advanced 2022 Solution View → 102

Assuming 1μ g of trace radioactive element X with a half life of 30 years is absorbed by a growing tree. The amount of X remaining in the tree after 100 years is_____ × 10 ^ - 1 μ

JEE Main 2022 Solution View → 103

The reaction between X and Y is first order with respect to X and zero order with respect to Y . Experiment [X] molL ^ - 1 [Y] molL ^ - 1 Initial rate mol L ^ - 1 min ^ - 1 I 0 .

JEE Main 2022 Solution View → 104

For a reaction, given below is the graph of lnkvs(1)/(T) . The activation energy for the reaction is equal to____ cal mol ^ - 1 .(Given : R = 2 calK ^ - 1 mol ^ - 1 ) ​​​​​​​

JEE Main 2022 Solution View → 105

For the given first order reaction A → B the half life of the reaction is 0 . 3010min . The ratio of the initial concentration of reactant to the concentration of reactant at time

JEE Main 2022 Solution View → 106

cases [A] & → & [B] Reactant & & Product cases If formation of compound [B] follows the first order of kinetics and after 70 minutes the concentration of [A] was found to be half

JEE Main 2022 Solution View → 107

2NO + 2 H _ 2 → N _ 2 + 2 H _ 2 O The above reaction has been studied at 800 ° C . The related data are given in the table below Reaction serial number Initial pressure of H _ 2 /

JEE Main 2022 Solution View → 108

At 30 ° C , the half life for the decomposition of AB _ 2 is 200s and is independent of the initial concentration of AB _ 2 . The time required for 80 % of the AB _ 2 to decompose

JEE Main 2022 Solution View → 109

For a reaction A → 2B + C the half lives are 100s and 50s when the concentration of reactant A is 0 . 5 and 1 . 0molL = respectively. The order of the reaction is

JEE Main 2022 Solution View → 110

For the decomposition of azomethane. CH _ 3 N _ 2 CH _ 3 (g) → CH _ 3 CH _ 3 (g) + N _ 2 a first order reaction, the variation in partial pressure with time at 600K is given as

JEE Main 2022 Solution View → 111

The half life for the decomposition of gaseous compound A is 240s when the gaseous pressure was 500 Torr initially. When the pressure was 250 Torr, the half life was found to be 4

JEE Main 2022 Solution View → 112

The equation k = (6 . 5 × 10 ^ 12 s ^ - 1 ) e ^ - 26000K / T is followed for the decomposition of compound A . The activation energy for the reaction is ____ KJ mol ^ - 1 .

JEE Main 2022 Solution View → 113

The activation energy of one of the reactions in a biochemical process is 532611J mol ^ - 1 . When the temperature falls from 310K to 300K , the change in rate constant observed

JEE Main 2022 Solution View → 114

A radioactive element has a half life of 200 days. The percentage of original activity remaining after 83 days is____(Nearest integer) (Given : antilog 0 . 125 = 1 . 333 , antilog

JEE Main 2022 Solution View → 115

For a first order reaction A → B , the rate constant, k = 5 . 5 × 10 ^ - 14 s ^ - 1 . The time required for 67 % completion of reaction is x × 10 ^ - 1 times the half life of

JEE Main 2022 Solution View → 116

It has been found that for a chemical reaction with rise in temperature by 9K the rate constant gets doubled. Assuming a reaction to be occurring at 300K , the value of activation

JEE Main 2022 Solution View → 117

The rate constant for a first order reaction is given by the following equation : lnk = 33 . 24 - 2 . 0 × 10 ^ 4 K T The Activation energy for the reaction is given by kJmol ^ - 1

JEE Main 2022 Solution View → 118

Catalyst A reduces the activation energy for a reaction by 10kJ mol ^ - 1 at 300K . The ratio of rate constants, k _ T , Catalysed k _ T , Uncatalysed is e ^ x . The value of x

JEE Main 2022 Solution View → 119

A flask is filled with equal moles of A and B . The half lives of A and B are 100s and 50s respectively and are independent of the initial concentration. The time required for the

JEE Main 2022 Solution View → 120

At 345K , the half life for the decomposition of a sample of a gaseous compound initially at 55 . 5kPa was 340s . When the pressure was 27 . 8kPa , the half life was found to be

JEE Main 2022 Solution View →
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