Chemical Kinetics and Nuclear Chemistry PYQs - Last 5 Years
JEE Main / Chemistry / Physical Chemistry / 120 recent questions
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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2022-2026
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120PYQs
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MCQ36.7%
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#2 Easy42
#3 Hard2
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Last 5 Years Chemical Kinetics and Nuclear Chemistry Questions
Showing 20 of 120 filtered questions.
1Chemical Kinetics And Nuclear Chemistry
Assuming \(1 \,\mu \mathrm{g}\) 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 ______ \(\times\, 10^{-1} \mu \mathrm{g}\).
[Given : ln 10 =...
[Given : ln 10 =...
INTEGER+4 / -12022
2Chemical Kinetics And Nuclear Chemistry
For a first order reaction A \(\to\) B, the rate constant, k = 5.5 \(\times\) 10\(-\)14 s\(-\)1. The time required for 67% completion of reaction is x \(\times\) 10\(-\)1 times the half life of reaction. The value of x is _____________ (Nea...
INTEGER+4 / -12022
3Chemical Kinetics And Nuclear Chemistry
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 0.693 = 4.93)
(Given : antilog 0.125 = 1.333, antilog 0.693 = 4.93)
INTEGER+4 / -12022
4Chemical Kinetics And Nuclear Chemistry
For the given first order reaction
\(\mathrm{A} \rightarrow \mathrm{B}\)
the half life of the reaction is \(0.3010 \mathrm{~min}\). The ratio of the initial concentration of reactant to the concentration of reactant at time $$2.0 \mathrm{~m...
\(\mathrm{A} \rightarrow \mathrm{B}\)
the half life of the reaction is \(0.3010 \mathrm{~min}\). The ratio of the initial concentration of reactant to the concentration of reactant at time $$2.0 \mathrm{~m...
INTEGER+4 / -12022
5Chemical Kinetics And Nuclear Chemistry
For kinetic study of the reaction of iodide ion with \(\mathrm{H}_{2} \mathrm{O}_{2}\) at room temperature :
(A) Always use freshly prepared starch solution.
(B) Always keep the concentration of sodium thiosulphate solution less than that o...
(A) Always use freshly prepared starch solution.
(B) Always keep the concentration of sodium thiosulphate solution less than that o...
MCQ+4 / -12022
6Chemical Kinetics And Nuclear Chemistry
For a reaction, given below is the graph of \(\ln k\) vs \({1 \over T}\). The activation energy for the reaction is equal to ____________ \(\mathrm{cal} \,\mathrm{mol}^{-1}\). (nearest integer)
(Given : $$\mathrm{R}=2 \,\mathrm{cal} \,\math...
(Given : $$\mathrm{R}=2 \,\mathrm{cal} \,\math...
INTEGER+4 / -12022
7Chemical Kinetics And Nuclear Chemistry
The rate constant for a first order reaction is given by the following equation:
\(\ln k = 33.24 - {{2.0 \times {{10}^4}\,K} \over T}\)
The activation energy for the reaction is given by ____________ kJ mol\(-\)1. (In nearest integer) (Give...
\(\ln k = 33.24 - {{2.0 \times {{10}^4}\,K} \over T}\)
The activation energy for the reaction is given by ____________ kJ mol\(-\)1. (In nearest integer) (Give...
INTEGER+4 / -12022
8Chemical Kinetics And Nuclear Chemistry
It has been found that for a chemical reaction with rise in temperature by 9 K the rate constant gets doubled. Assuming a reaction to be occurring at 300 K, the value of activation energy is found to be ____________ kJ mol\(-\)1. [nearest i...
INTEGER+4 / -12022
9Chemical Kinetics And Nuclear Chemistry
\(2 \mathrm{NO}+2 \mathrm{H}_{2} \rightarrow \mathrm{N}_{2}+2 \mathrm{H}_{2} \mathrm{O}\)
The above reaction has been studied at \(800^{\circ} \mathrm{C}\). The related data are given in the table below
.tg {border-collapse:collapse;borde...
The above reaction has been studied at \(800^{\circ} \mathrm{C}\). The related data are given in the table below
.tg {border-collapse:collapse;borde...
INTEGER+4 / -12022
10Chemical Kinetics And Nuclear Chemistry
\(\matrix{
{[A]} & \to & {[B]} \cr
{{\mathop{\rm Reactant}\nolimits} } & {} & {{\mathop{\rm Product}\nolimits} } \cr
}\)
If formation of compound \([\mathrm{B}]\) follows the first order of kinetics and after 70 minutes the c...
If formation of compound \([\mathrm{B}]\) follows the first order of kinetics and after 70 minutes the c...
INTEGER+4 / -12022
11Chemical Kinetics And Nuclear Chemistry
A flask is filled with equal moles of A and B. The half lives of A and B are 100 s and 50 s respectively and are independent of the initial concentration. The time required for the concentration of A to be four times that of B is __________...
INTEGER+4 / -12022
12Chemical Kinetics And Nuclear Chemistry
Catalyst A reduces the activation energy for a reaction by 10 kJ mol\(-\)1 at 300 K. The ratio of rate constants, \({{{}^kT,\,Catalysed} \over {{}^kT,\,Uncatalysed}}\) is ex. The value of x is ___________. [nearest integer]
[Assume that the...
[Assume that the...
INTEGER+4 / -12022
13Chemical Kinetics And Nuclear Chemistry
For a reaction \(\mathrm{A} \rightarrow 2 \mathrm{~B}+\mathrm{C}\) the half lives are \(100 \mathrm{~s}\) and \(50 \mathrm{~s}\) when the concentration of reactant \(\mathrm{A}\) is \(0.5\) and \(1.0 \mathrm{~mol} \mathrm{~L}^{-1}\) respect...
INTEGER+4 / -12022
14Chemical Kinetics And Nuclear Chemistry
At \(30^{\circ} \mathrm{C}\), the half life for the decomposition of \(\mathrm{AB}_{2}\) is \(200 \mathrm{~s}\) and is independent of the initial concentration of \(\mathrm{AB}_{2}\). The time required for \(80 \%\) of the $$\mathrm{AB}_{2}...
MCQ+4 / -12022
15Chemical Kinetics And Nuclear Chemistry
For a given chemical reaction
\(\gamma\)1A + \(\gamma\)2B \(\to\) \(\gamma\)3C + \(\gamma\)4D
Concentration of C changes from 10 mmol dm\(-\)3 to 20 mmol dm\(-\)3 in 10 seconds. Rate of appearance of D is 1.5 times the rate of disappearance...
\(\gamma\)1A + \(\gamma\)2B \(\to\) \(\gamma\)3C + \(\gamma\)4D
Concentration of C changes from 10 mmol dm\(-\)3 to 20 mmol dm\(-\)3 in 10 seconds. Rate of appearance of D is 1.5 times the rate of disappearance...
INTEGER+4 / -12022
16Chemical Kinetics And Nuclear Chemistry
At 345 K, the half life for the decomposition of a sample of a gaseous compound initially at 55.5 kPa was 340 s. When the pressure was 27.8 kPa, the half life was found to be 170 s. The order of the reaction is ____________. [integer answer...
INTEGER+4 / -12022
17Chemical Kinetics And Nuclear Chemistry
The half life for the decomposition of gaseous compound \(\mathrm{A}\) is \(240 \mathrm{~s}\) when the gaseous pressure was 500 Torr initially. When the pressure was 250 Torr, the half life was found to be \(4.0\) min. The order of the reac...
INTEGER+4 / -12022
18Chemical Kinetics And Nuclear Chemistry
For the decomposition of azomethane.
CH3N2CH3(g) \(\to\) CH3CH3(g) + N2(g), a first order reaction, the variation in partial pressure with time at 600 K is given as
The half life of the reaction is __________ \(\times\) 10\(-\)5 s. [Neares...
CH3N2CH3(g) \(\to\) CH3CH3(g) + N2(g), a first order reaction, the variation in partial pressure with time at 600 K is given as
The half life of the reaction is __________ \(\times\) 10\(-\)5 s. [Neares...
INTEGER+4 / -12022
19Chemical Kinetics And Nuclear Chemistry
The rate constants for decomposition of acetaldehyde have been measured over the temperature range 700 - 1000 K. The data has been analysed by plotting ln k vs \({{{{10}^3}} \over T}\) graph. The value of activation energy for the reaction ...
INTEGER+4 / -12022
20Chemical Kinetics And Nuclear Chemistry
For a first order reaction, the time required for completion of 90% reaction is 'x' times the half life of the reaction. The value of 'x' is
(Given : ln 10 = 2.303 and log 2 = 0.3010)
(Given : ln 10 = 2.303 and log 2 = 0.3010)
MCQ+4 / -12022