Chemical Kinetics PYQs - Last 10 Years
WB JEE / Chemistry / Physical Chemistry / 15 recent questions
ChemistryPhysical Chemistry2017-2026
Practice 15 WB JEE Chemistry questions from Chemical Kinetics. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Chemistry / Physical Chemistry
2018-2026
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2022-2026
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2017-2026
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MCQ93.3%
MCQM6.7%
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8 in last 5 years15 in last 10 years
Last 10 Years Chemical Kinetics Questions
Showing 15 of 15 filtered questions.
1Chemical Kinetics
In a first order reaction，the concentration of reactant decreases from 400 moles lit $^{-1}$ to 50 moles lit ${ }^{-1}$ in $7 \cdot 5 \times 10^3 \mathrm{~s}$ ．The rate constant of the reaction is（approximately）
MCQ+1 / -0.252026
2Chemical Kinetics
An organic compound undergoes first order decomposition．The time taken for its decomposition to $\frac{1}{8}$ th and $\frac{1}{10}$ th of its initial concentration are $t_{1 / 8}$ and $t_{1 / 10}$ respectively．The value of $\left[\frac{t_{1...
MCQ+2 / -0.52026
3Chemical Kinetics
An egg takes 4.0 minutes to boil at sea level where the boiling point of water is $T_1 K$, where as it takes 8.0 minutes to boil on a mountain top where the boiling point of water is $\mathrm{T}_2 \mathrm{~K}$. The activation energy for the...
MCQ+2 / -0.52025
4Chemical Kinetics
For a chemical reaction, half-life period $\left(t_{\frac{1}{2}}\right)$ is 10 minutes. How much reactant will be left after 20 minutes if one starts with 100 moles of reactant and the order of the reaction be (i) zero, (ii) one and (iii) t...
MCQ+1 / -0.252025
5Chemical Kinetics
For a first order reaction with rate constant \(\mathrm{k}\), the slope of the plot of \(\log\) (reactant concentration) against time is
MCQ+1 / -0.252024
6Chemical Kinetics
For the reaction A + B \(\to\) C, we have the following data:
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MCQ+1 / -0.252023
7Chemical Kinetics
Which of the following would give a linear plot?
(k is the rate constant of an elementary reaction and T is temp. in absolute scale)
(k is the rate constant of an elementary reaction and T is temp. in absolute scale)
MCQ+1 / -0.252023
8Chemical Kinetics
Which of the statements are incorrect?
MCQM+2 / -02022
9Chemical Kinetics
2.5 mL 0.4 M weak monoacidic base (Kb = 1 \(\times\) 10\(-\)12 at 25\(^\circ\)C) is titrated with 2/15 M HCl in water at 25\(^\circ\)C. The concentration of H+ at equivalence point is (Kw = 1 \(\times\) 10\(-\)14, at 25\(^\circ\)C)
MCQ+1 / -0.252021
10Chemical Kinetics
Under the same reaction conditions, initial concentration of 1.386 mol dm\(-\)3 of a substance becomes half in 40 s and 20 s through first-order and zero-order kinetics respectively. Ratio \(\left( {{{{k_1}} \over {{k_0}}}} \right)\) of the...
MCQ+1 / -0.252021
11Chemical Kinetics
The equilibrium constant for the reaction N2(g) + O2(g) \(\rightleftharpoons\) 2NO(g) is 4 \(\times\) 10\(-\)4 at 2000 K. In presence of a catalyst the equilibrium is attained 10 times faster. Therefore, the equilibrium constant, in presenc...
MCQ+1 / -0.252021
12Chemical Kinetics
For a reaction 2A + B \(\to\) P, when concentration of B alone is doubled, t1/2 does not change and when concentrations of both A and B is doubled, rate increases by a factor of 4. The unit of rate constant is,
MCQ+2 / -0.52020
13Chemical Kinetics
The kinetic study of a reaction like vA \(\to\) P at 300 K provides the following curve, where concentration is taken in mol dm\(-\)3 and time in min.Identify the correct order (n) and rate constant (k)
MCQ+2 / -0.672019
14Chemical Kinetics
Consider the following two first order reactions occurring at 298 K with same initial concentration of A :(1) A \(\to\) B; rate constant, k = 0.693 min\(-\)1(2) A \(\to\) C; half-life, t1/2 = 0.693 minChoose the correct option.
MCQ+1 / -0.332019
15Chemical Kinetics
The following equilibrium constants are given\({N_2} + 3{H_2}\) \(\rightleftharpoons\) \(2N{H_3}\); \({K_1}\)\({N_2} + {O_2}\) \(\rightleftharpoons\) \(2NO\); \({K_2}\)\({H_2} + {1 \over 2}{O_2}\) \(\rightleftharpoons\) \({H_2}O\); $${K_3}$...
MCQ+1 / -0.332018