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Previous year question hub

Chemical Kinetics - Physical Chemistry - Chemistry Previous Year Questions

Practice Chemical Kinetics - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

9Papers
9Years
30Questions
1Topics

Chemical Kinetics question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Chemical Kinetics. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Not classified 30 100%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Multiple Choices 30 100%

Subject weightage

Top subjects by unique question coverage.

Chemistry
30 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
30 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Chemical Kinetics
30 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

KCET 2025
4 Qs
KCET 2024
3 Qs
KCET 2023
3 Qs
KCET 2022
4 Qs
KCET 2021
4 Qs
KCET 2020
3 Qs
KCET 2019
3 Qs
KCET 2018
3 Qs
KCET 2017
3 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
KCET 202520254View paper
KCET 202420243View paper
KCET 202320233View paper
KCET 202220224View paper
KCET 202120214View paper
KCET 202020203View paper
KCET 201920193View paper
KCET 201820183View paper
KCET 201720173View paper

All Chemical Kinetics previous year questions

Practice every matching question in batches of 20, with every available option.

1
2017 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2017
For a reaction $\frac{1}{2} A \rightarrow 2 B$ rate of disappearance of $A$ is related to rate of appearance of $B$ by the expression
A
$\frac{-d[A]}{d t}=\frac{1}{2} \frac{d[B]}{d t}$
B
$\frac{-d[A]}{d t}=4 \frac{d[B]}{d t}$
C
$\frac{-d[A]}{d t}=\frac{1}{4} \frac{d[B]}{d t}$
D
$\frac{-d[A]}{d t}=\frac{d[B]}{d t}$
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2
2017 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2017
Which of the following statement is incorrect?
A
The rate of law for any reaction cannot be determined experimentally.
B
Complex reactions have fractional order.
C
Biomolecular reactions involved simultaneous collision between two species.
D
Molecularity is only applicable for elementary reaction
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3
2017 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2017
Which of the following statement is in accordance with the Arrhenius equations?
A
Rate of reaction does not change with increase in activation energy
B
Rate constant decreases exponentially with increase in temperature
C
Rate of a reaction increases with increases in temperature
D
Rate of a reaction increases with decreases in activation energy
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4
2018 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2018
The temperature coefficient of a reaction is 2. When the temperature is increased from $30^{\circ} \mathrm{C}$ to $90^{\circ} \mathrm{C}$, the rate of saction is increased by
A
150 times
B
410 times
C
72 times
D
64 times
Open complete paper
5
2018 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2018
The value of rate constant of a pseudo first order reaction
A
depends only on temperature
B
depends on the concentration of reactants present in small amounts
C
depends on the concentration of reactants present in excess
D
is independent of the concentration of reactants
Open complete paper
6
2018 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2018
For the reaction, $2 \mathrm{SO}_2+\mathrm{O}_2 \rightleftharpoons 2 \mathrm{SO}_3$, the rate of disappearance of $\mathrm{O}_2$ is $2 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$. The rate of appearance of $\mathrm{SO}_3$ is
A
$2 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$
B
$4 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$
C
$1 \times 10^{-1} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$
D
$6 \times 10^{-4} \mathrm{molLL}^{-1} \mathrm{~s}^{-1}$
Open complete paper
7
2019 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2019

The plot of \(t_{1 / 2} \mathrm{~v} / \mathrm{s}~[R]_0\) for a reaction is a straight-line parallel to \(X\)-axis. The unit for the rate constant of this reaction is

A
\(\mathrm{mol} \mathrm{~L}^{-1} \mathrm{~s}\)
B
\(\mathrm{mol~L}^{-1} \mathrm{~s}^{-1}\)
C
\(\mathrm{L} \mathrm{~mol}^{-1} \mathrm{~s}^{1-}\)
D
\(\mathrm{s}^{-1}\)
Open complete paper
8
2019 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2019

1L of \(2 \mathrm{M~CH}_3 \mathrm{COOH}\) is mixed with 1L of \(3 \mathrm{M} \mathrm{~C}_2 \mathrm{H}_5 \mathrm{OH}\) to form an ester. The rate of the reaction with respect to the initial rate when each solution is diluted with an equal volume of water will be

A
0.25 times
B
2 times
C
0.5 times
D
4 times
Open complete paper
9
2019 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2019

Which is a wrong statement?

A
Rate constant \(k=\) Arrhenius constant \(A\) : if \(E_a=0\)
B
\(e^{-E_a / R T}\) gives the fraction of reactant molecules that are activated at the given temperature
C
In \(k v s \frac{1}{T}\) plot is a straight line
D
presence of catalyst will not alter the value of \(E_a\)
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10
2020 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2020

The time required for \(60 \%\) completion of a first order reaction is \(50 \mathrm{~min}\). The time required for \(93.6 \%\) completion of the same reaction will be

A
100 min
B
83.8 min
C
50 min
D
150 min
Open complete paper
11
2020 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2020

The rate constant of a reaction is given by \(k=P Z e^{-E_a / R T}\) under standard notation. In order to speed up the reaction, which of the following factors has to be decreased?

A
Z
B
Both Z and T
C
\(E_a\)
D
T
Open complete paper
12
2020 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2020

For an elementary reaction \(2 A+3 B \rightarrow 4 C+D\) the rate of appearance of $C$ at time '\(T\)' is \(2.8 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}\). Rate of disappearance of \(B\) at '\(t\)' $t$ will be

A
\(\frac{4}{3}\left(2.8 \times 10^{-3}\right) \mathrm{mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}\)
B
\(\frac{3}{4}\left(2.8 \times 10^{-3}\right) \mathrm{mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}\)
C
\(2\left(2.8 \times 10^{-3}\right) \mathrm{mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}\)
D
\(\frac{1}{4}\left(2.8 \times 10^{-3}\right) \mathrm{mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}\)
Open complete paper
13
2021 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2021

The rate of a gaseous reaction is given by the expression \(k[A][B]^2\). If the volume of vessel is reduced to one half of the initial volume, the reaction rate as compared to original rate is

A
\(\frac{1}{16}\)
B
\(\frac{1}{8}\)
C
8
D
16
Open complete paper
14
2021 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2021

Higher order \((>3)\) reactions are rare due to

A
shifting of equilibrium towards reactants due to elastic collisions
B
loss of active species on collision
C
low probability of simultaneous collision of all reacting species
D
increase in entropy as more molecules are involved
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15
2021 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2021

If the rate constant for a first order reaction is \(k\), the time \((t)\) required for the completion of \(99 \%\) of the reaction is given by

A
\(t=\frac{4.606}{k}\)
B
\(t=\frac{2.303}{k}\)
C
\(t=\frac{0.693}{k}\)
D
\(t=\frac{6.909}{k}\)
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16
2021 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2021

For a reaction, \(A+2 B \rightarrow\) Products, when concentration of \(B\) alone is increased half-life remains the same. If concentration of \(A\) alone is doubled, rate remains the same. The unit of rate constant for the reaction is

A
\(\mathrm{s}^{-1}\)
B
\(\mathrm{L} \mathrm{~mol}^{-1} \mathrm{~s}^{-1}\)
C
\(\mathrm{mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\)
D
\(\mathrm{atm}^{-1}\)
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17
2022 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2022

Half-life of a reaction is found to be inversely proportional to the fifth power of its initial concentration, the order of reaction is

A
4
B
5
C
6
D
3
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18
2022 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2022

A first order reaction is half completed in \(45 \mathrm{~min}\). How long does it need \(99.9 \%\) of the reaction to be completed?

A
7.5 Hours
B
10 Hours
C
20 Hours
D
5 Hours
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19
2022 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2022

For \(n\)th order of reaction, half-life period is directly proportional to

A
\(\frac{1}{a^{1-n}}\)
B
\(a^{n-1}\)
C
\(a^{1-n}\)
D
\(\frac{1}{a^{n-1}}\)
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20
2022 · Chemistry · Physical Chemistry · Chemical Kinetics
KCET 2022

The rate of the reaction, \(\mathrm{CH}_3 \mathrm{COOC}_2 \mathrm{H}_5+\mathrm{NaOH} \longrightarrow \mathrm{CH}_3 \mathrm{COONa}+\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}\) is given by the equation, rate \(=k\left[\mathrm{CH}_3 \mathrm{COOC}_2 \mathrm{H}_5\right][\mathrm{NaOH}]\). If concentration is expressed in \(\mathrm{mol} \mathrm{L}^{-1}\), the unit of \(k\) is

A
\(\mathrm{mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\)
B
\(\mathrm{L} \mathrm{~mol}^{-1} \mathrm{~s}^{-1}\)
C
\(\mathrm{s}^{-1}\)
D
\(\mathrm{mol}^{-2} \mathrm{~L}^2 \mathrm{~S}^{-1}\)
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Showing 20 of 30 questions