Chemical Kinetics and Nuclear Chemistry PYQs - Last 5 Years
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ChemistryPhysical Chemistry2022-2026
Practice 120 JEE Main Chemistry questions from Chemical Kinetics and Nuclear Chemistry. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 5 Years Chemical Kinetics and Nuclear Chemistry Questions
Showing 50 of 120 filtered questions.
1Chemical Kinetics And Nuclear Chemistry
Which of the following statement is not true for radioactive decay?
MCQ+4 / -12025
2Chemical Kinetics And Nuclear Chemistry
$\mathrm{A \rightarrow B}$
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 for such isomeric transformation is $191.48 \m...
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 for such isomeric transformation is $191.48 \m...
INTEGER+4 / -12025
3Chemical Kinetics And Nuclear Chemistry
Consider the given figure and choose the correct option :
MCQ+4 / -12025
4Chemical Kinetics And Nuclear Chemistry
Given below are two statements :
Statement I : The rate law for the reaction \(A+B \rightarrow C\) is rate \((r)=k[A]^2[B]\). When the concentration of both \(\mathrm{A}\) and \(\mathrm{B}\) is doubled, the reaction rate is increased "\(x\)...
Statement I : The rate law for the reaction \(A+B \rightarrow C\) is rate \((r)=k[A]^2[B]\). When the concentration of both \(\mathrm{A}\) and \(\mathrm{B}\) is doubled, the reaction rate is increased "\(x\)...
INTEGER+4 / -12024
5Chemical Kinetics And Nuclear Chemistry
Consider the following first order gas phase reaction at constant temperature \(\mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{B}(\mathrm{~g})+\mathrm{C}(\mathrm{g})\)
If the total pressure of the gases is found to be 200 torr after 23 $$\ma...
If the total pressure of the gases is found to be 200 torr after 23 $$\ma...
INTEGER+4 / -12024
6Chemical Kinetics And Nuclear Chemistry
Consider the following reaction
\(\mathrm{A}+\mathrm{B} \rightarrow \mathrm{C}\)
The time taken for A to become \(1 / 4^{\text {th }}\) of its initial concentration is twice the time taken to become \(1 / 2\) of the same. Also, when the cha...
\(\mathrm{A}+\mathrm{B} \rightarrow \mathrm{C}\)
The time taken for A to become \(1 / 4^{\text {th }}\) of its initial concentration is twice the time taken to become \(1 / 2\) of the same. Also, when the cha...
INTEGER+4 / -12024
7Chemical Kinetics And Nuclear Chemistry
For a reaction \(A \xrightarrow{\mathrm{K}_1} \mathrm{~B} \xrightarrow{\mathrm{K}_2} \mathrm{C}\)
If the rate of formation of B is set to be zero then the concentration of B is given by :
If the rate of formation of B is set to be zero then the concentration of B is given by :
MCQ+4 / -12024
8Chemical Kinetics And Nuclear Chemistry
Time required for \(99.9 \%\) completion of a first order reaction is _________ times the time required for completion of \(90 \%\) reaction.(nearest integer)
INTEGER+4 / -12024
9Chemical Kinetics And Nuclear Chemistry
Consider the two different first order reactions given below
$$\begin{aligned} & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{C} \text { (Reaction 1) } \\ & \mathrm{P} \rightarrow \mathrm{Q} \text { (Reaction 2) } \end{aligned}$$
The ratio of ...
$$\begin{aligned} & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{C} \text { (Reaction 1) } \\ & \mathrm{P} \rightarrow \mathrm{Q} \text { (Reaction 2) } \end{aligned}$$
The ratio of ...
INTEGER+4 / -12024
10Chemical Kinetics And Nuclear Chemistry
During Kinetic study of reaction \(\mathrm{2 A+B \rightarrow C+D}\), the following results were obtained :
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INTEGER+4 / -12024
11Chemical Kinetics And Nuclear Chemistry
Consider the following single step reaction in gas phase at constant temperature.
\(2 \mathrm{~A}_{(\mathrm{g})}+\mathrm{B}_{(\mathrm{g})} \rightarrow \mathrm{C}_{(\mathrm{g})}\)
The initial rate of the reaction is recorded as $$\mathrm{r}_...
\(2 \mathrm{~A}_{(\mathrm{g})}+\mathrm{B}_{(\mathrm{g})} \rightarrow \mathrm{C}_{(\mathrm{g})}\)
The initial rate of the reaction is recorded as $$\mathrm{r}_...
INTEGER+4 / -12024
12Chemical Kinetics And Nuclear Chemistry
Consider the following transformation involving first order elementary reaction in each step at constant temperature as shown below.
Some details of the above reactions are listed below.
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....
Some details of the above reactions are listed below.
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....
INTEGER+4 / -12024
13Chemical Kinetics And Nuclear Chemistry
Consider the following reaction, the rate expression of which is given below
$$\begin{aligned} & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{C} \\ & \text { rate }=\mathrm{k}[\mathrm{A}]^{1 / 2}[\mathrm{~B}]^{1 / 2} \end{aligned}$$
The reacti...
$$\begin{aligned} & \mathrm{A}+\mathrm{B} \rightarrow \mathrm{C} \\ & \text { rate }=\mathrm{k}[\mathrm{A}]^{1 / 2}[\mathrm{~B}]^{1 / 2} \end{aligned}$$
The reacti...
INTEGER+4 / -12024
14Chemical Kinetics And Nuclear Chemistry
Integrated rate law equation for a first order gas phase reaction is given by (where \(\mathrm{P}_{\mathrm{i}}\) is initial pressure and \(\mathrm{P}_{\mathrm{t}}\) is total pressure at time \(t\))
MCQ+4 / -12024
15Chemical Kinetics And Nuclear Chemistry
\(\mathrm{r}=\mathrm{k}[\mathrm{A}]\) for a reaction, \(50 \%\) of \(\mathrm{A}\) is decomposed in 120 minutes. The time taken for \(90 \%\) decomposition of \(\mathrm{A}\) is _________ minutes.
INTEGER+4 / -12024
16Chemical Kinetics And Nuclear Chemistry
The rate of First order reaction is \(0.04 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\) at 10 minutes and \(0.03 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\) at 20 minutes after initiation. Half life of the reaction is _______ min...
INTEGER+4 / -12024
17Chemical Kinetics And Nuclear Chemistry
\(\mathrm{NO}_2\) required for a reaction is produced by decomposition of \(\mathrm{N}_2 \mathrm{O}_5\) in \(\mathrm{CCl}_4\) as by equation
$$2 \mathrm{~N}_2 \mathrm{O}_{5(\mathrm{~g})} \rightarrow 4 \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{O}...
$$2 \mathrm{~N}_2 \mathrm{O}_{5(\mathrm{~g})} \rightarrow 4 \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{O}...
INTEGER+4 / -12024
18Chemical Kinetics And Nuclear Chemistry
For a reaction taking place in three steps at same temperature, overall rate constant \(\mathrm{K}=\frac{\mathrm{K}_1 \mathrm{~K}_2}{\mathrm{~K}_3}\). If \(\mathrm{Ea}_1, \mathrm{Ea}_2\) and \(\mathrm{Ea}_3\) are 40, 50 and $$60 \mathrm{~kJ...
INTEGER+4 / -12024
19Chemical Kinetics And Nuclear Chemistry
The half-life of radioisotope bromine - 82 is 36 hours. The fraction which remains after one day is ________ \(\times 10^{-2}\).
(Given antilog \(0.2006=1.587\))
(Given antilog \(0.2006=1.587\))
INTEGER+4 / -12024
20Chemical Kinetics And Nuclear Chemistry
Consider the following data for the given reaction
\(2 \mathrm{HI}_{(\mathrm{g})} \rightarrow \mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})}\)
The order of the reaction is _________.
\(2 \mathrm{HI}_{(\mathrm{g})} \rightarrow \mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})}\)
The order of the reaction is _________.
INTEGER+4 / -12024
21Chemical Kinetics And Nuclear Chemistry
Time required for completion of \(99.9 \%\) of a First order reaction is ________ times of half life \(\left(t_{1 / 2}\right)\) of the reaction.
INTEGER+4 / -12024
22Chemical Kinetics And Nuclear Chemistry
The ratio of $\frac{{ }^{14} \mathrm{C}}{{ }^{12} \mathrm{C}}$ in a piece of wood is $\frac{1}{8}$ part that of atmosphere. If half life of ${ }^{14} \mathrm{C}$ is 5730 years, the age of wood sample is ________ years.
INTEGER+4 / -12024
23Chemical Kinetics And Nuclear Chemistry
The following data were obtained during the first order thermal decomposition of a gas A at constant volume :
$\mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{~B}(\mathrm{~g})+\mathrm{C}(\mathrm{g})$
table {
border-collapse: collapse;
...
$\mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{~B}(\mathrm{~g})+\mathrm{C}(\mathrm{g})$
table {
border-collapse: collapse;
...
INTEGER+4 / -12024
24Chemical Kinetics And Nuclear Chemistry
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 reaction has zero activation energy, its rate is independent...
(A) The stronger the temperature dependence of the rate constant, the higher is the activation energy.
(B) If a reaction has zero activation energy, its rate is independent...
INTEGER+4 / -12023
25Chemical Kinetics And Nuclear Chemistry
The correct reaction profile diagram for a positive catalyst reaction.
MCQ+4 / -12023
26Chemical Kinetics And Nuclear Chemistry
Consider the following reaction that goes from A to B in three steps as shown below:
Choose the correct option
Choose the correct option
MCQ+4 / -12023
27Chemical Kinetics And Nuclear Chemistry
A \(\to\) B
The rate constants of the above reaction at 200 K and 300 K are 0.03 min\(^{-1}\) and 0.05 min\(^{-1}\) respectively. The activation energy for the reaction is ___________ J (Nearest integer)
(Given : \(\mathrm{ln10=2.3}\)
$$\ma...
The rate constants of the above reaction at 200 K and 300 K are 0.03 min\(^{-1}\) and 0.05 min\(^{-1}\) respectively. The activation energy for the reaction is ___________ J (Nearest integer)
(Given : \(\mathrm{ln10=2.3}\)
$$\ma...
INTEGER+4 / -12023
28Chemical Kinetics And Nuclear Chemistry
The rate constant for a first order reaction is $20 \mathrm{~min}^{-1}$. The time required for the initial concentration of the reactant to reduce to its $\frac{1}{32}$ level is _______ $\times 10^{-2} \mathrm{~min}$. (Nearest integer)
(Giv...
(Giv...
INTEGER+4 / -12023
29Chemical Kinetics And Nuclear Chemistry
If compound A reacts with B following first order kinetics with rate constant \(2.011 \times 10^{-3} \mathrm{~s}^{-1}\). The time taken by \(\mathrm{A}\) (in seconds) to reduce from \(7 \mathrm{~g}\) to \(2 \mathrm{~g}\) will be ___________...
INTEGER+4 / -12023
30Chemical Kinetics And Nuclear Chemistry
An organic compound undergoes first-order decomposition. If the time taken for the $60 \%$ decomposition is $540 \mathrm{~s}$, then the time required for $90 \%$ decomposition will be ________ s. (Nearest integer).
Given: $\ln 10=2.3 ; \lo...
Given: $\ln 10=2.3 ; \lo...
INTEGER+4 / -12023
31Chemical Kinetics And Nuclear Chemistry
For certain chemical reaction \(X\to Y\), the rate of formation of product is plotted against the time as shown in the figure. The number of \(\mathrm{\underline {correct} }\) statement/s from the following is ___________.
(A) Over all ord...
(A) Over all ord...
INTEGER+4 / -12023
32Chemical Kinetics And Nuclear Chemistry
For conversion of compound A \(\to\) B, the rate constant of the reaction was found to be \(\mathrm{4.6\times10^{-5}~L~mol^{-1}~s^{-1}}\). The order of the reaction is ____________.
INTEGER+4 / -12023
33Chemical Kinetics And Nuclear Chemistry
For the first order reaction A \(\to\) B, the half life is 30 min. The time taken for 75% completion of the reaction is _________ min. (Nearest integer)
Given : log 2 = 0.3010
log 3 = 0.4771
log 5 = 0.6989
Given : log 2 = 0.3010
log 3 = 0.4771
log 5 = 0.6989
INTEGER+4 / -12023
34Chemical Kinetics And Nuclear Chemistry
A first order reaction has the rate constant, \(\mathrm{k=4.6\times10^{-3}~s^{-1}}\). The number of correct statement/s from the following is/are __________
Given : \(\mathrm{\log3=0.48}\)
A. Reaction completes in 1000 s.
B. The reaction ha...
Given : \(\mathrm{\log3=0.48}\)
A. Reaction completes in 1000 s.
B. The reaction ha...
INTEGER+4 / -12023
35Chemical Kinetics And Nuclear Chemistry
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, higher is the value of the temperature coefficient.
C. At...
A. Larger the activation energy, smaller is the value of the rate constant.
B. The higher is the activation energy, higher is the value of the temperature coefficient.
C. At...
INTEGER+4 / -12023
36Chemical Kinetics And Nuclear Chemistry
A student has studied the decomposition of a gas AB\(_3\) at 25\(^\circ\)C. He obtained the following data.
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MCQ+4 / -12023
37Chemical Kinetics And Nuclear Chemistry
A and B are two substances undergoing radioactive decay in a container. The half life of A is 15 min and that of B is 5 min. If the initial concentration of B is 4 times that of A and they both start decaying at the same time, how much time...
INTEGER+4 / -12023
38Chemical Kinetics And Nuclear Chemistry
\(\mathrm{A}\) \(\rightarrow \mathrm{B}\)
The above reaction is of zero order. Half life of this reaction is \(50 \mathrm{~min}\). The time taken for the concentration of \(\mathrm{A}\) to reduce to one-fourth of its initial value is ______...
The above reaction is of zero order. Half life of this reaction is \(50 \mathrm{~min}\). The time taken for the concentration of \(\mathrm{A}\) to reduce to one-fourth of its initial value is ______...
INTEGER+4 / -12023
39Chemical Kinetics And Nuclear Chemistry
For a reversible reaction $\mathrm{A} \rightleftharpoons \mathrm{B}$, the $\Delta \mathrm{H}_{\text{forward reaction}} = 20 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The activation energy of the uncatalysed forward reaction is $300 \mathrm{~kJ} \ma...
INTEGER+4 / -12023
40Chemical Kinetics And Nuclear Chemistry
\(\mathrm{t}_{87.5}\) is the time required for the reaction to undergo \(87.5 \%\) completion and \(\mathrm{t}_{50}\) is the time required for the reaction to undergo \(50 \%\) completion. The relation between \(\mathrm{t}_{87.5}\) and $$\m...
INTEGER+4 / -12023
41Chemical Kinetics And Nuclear Chemistry
A(g) \(\to\) 2B(g) + C(g) is a first order reaction. The initial pressure of the system was found to be 800 mm Hg which increased to 1600 mm Hg after 10 min. The total pressure of the system after 30 min will be _________ mm Hg. (Nearest in...
INTEGER+4 / -12023
42Chemical Kinetics And Nuclear Chemistry
The reaction \(2 \mathrm{NO}+\mathrm{Br}_{2} \rightarrow 2 \mathrm{NOBr}\)
takes places through the mechanism given below:
\(\mathrm{NO}+\mathrm{Br}_{2} \Leftrightarrow \mathrm{NOBr}_{2}\) (fast)
$$\mathrm{NOBr}_{2}+\mathrm{NO} \rightarrow ...
takes places through the mechanism given below:
\(\mathrm{NO}+\mathrm{Br}_{2} \Leftrightarrow \mathrm{NOBr}_{2}\) (fast)
$$\mathrm{NOBr}_{2}+\mathrm{NO} \rightarrow ...
INTEGER+4 / -12023
43Chemical Kinetics And Nuclear Chemistry
\(\mathrm{KClO}_{3}+6 \mathrm{FeSO}_{4}+3 \mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{KCl}+3 \mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}+3 \mathrm{H}_{2} \mathrm{O}\)
The above reaction was studied at \(300 \mathrm{~K}\) by monit...
The above reaction was studied at \(300 \mathrm{~K}\) by monit...
INTEGER+4 / -12023
44Chemical Kinetics And Nuclear Chemistry
For a chemical reaction \(\mathrm{A}+\mathrm{B} \rightarrow\) Product, the order is 1 with respect to \(\mathrm{A}\) and \(\mathrm{B}\).
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MCQ+4 / -12023
45Chemical Kinetics And Nuclear Chemistry
A molecule undergoes two independent first order reactions whose respective half lives are 12 min and 3 min. If both the reactions are occurring then the time taken for the 50% consumption of the reactant is ___________ min. (Nearest intege...
INTEGER+4 / -12023
46Chemical Kinetics And Nuclear Chemistry
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 reactant in the chemical equation may not affect the rate of reactio...
A. The successive half lives of zero order reactions decreases with time.
B. A substance appearing as reactant in the chemical equation may not affect the rate of reactio...
INTEGER+4 / -12023
47Chemical Kinetics And Nuclear Chemistry
For the reaction P \(\to\) B, the values of frequency factor A and activation energy EA are 4 \(\times\) 1013 s\(-\)1 and 8.3 kJ mol\(-\)1 respectively. If the reaction is of first order, the temperature at which the rate constant is 2 $$\t...
INTEGER+4 / -12022
48Chemical Kinetics And Nuclear Chemistry
The activation energy of one of the reactions in a biochemical process is 532611 J mol\(-\)1. When the temperature falls from 310 K to 300 K, the change in rate constant observed is k300 = x \(\times\) 10\(-\)3 k310. The value of x is _____...
INTEGER+4 / -12022
49Chemical Kinetics And Nuclear Chemistry
The equation k = (6.5 \(\times\) 1012s\(-\)1)e\(-\)26000K/T is followed for the decomposition of compound A. The activation energy for the reaction is ________ kJ mol\(-\)1. [nearest integer]
(Given : R = 8.314 J K\(-\)1 mol\(-\)1)
(Given : R = 8.314 J K\(-\)1 mol\(-\)1)
INTEGER+4 / -12022
50Chemical Kinetics And Nuclear Chemistry
The reaction between X and Y is first order with respect to X and zero order with respect to Y.
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INTEGER+4 / -12022