List of top Chemistry Questions on Chemical Kinetics asked in JEE Advanced

Consider the following reaction,
\(2H_2(g) + 2NO(g) \rightarrow N_2(g) + 2H_2O(g)\)
which follows the mechanism given below:
\(2NO(g)\underset{k_{-1}}{\stackrel{k_1}{\rightleftharpoons}} N_2O_2(g)\) (fast equilibrium)
\(N_2O_2(g)+H_2(g) \xrightarrow[]{K_2}N_2O(g)+H_2O\)  (slow reaction)
\(N_2O(g)+H_2(g) \xrightarrow[]{K_3}N_2(g)+H_2O\)  (fast reaction)
The order of the reaction is________

For the following reaction;
\(\begin{array}{l}2X + Y\overset{k}{\rightarrow}P\end{array}\)

The rate of reaction is
\(\begin{array}{l}\frac{d[P]}{dt} = k[X]\end{array}\)
Two moles of X are mixed with one mole of Y to make 1.0 L of solution. At 50 s, 0.5 mole of Y is left in the reaction mixture. The correct statement(s) about the reaction is(are). (Use: ln 2 = 0.693)

For the following reaction $2 X+Y \xrightarrow{k} P$ the rate of reaction is $\frac{d[P]}{d t}=k[X]$ Two moles of $X$ are mixed with one mole of $Y$ to make $10\, L$ of solution At $50 \,s$, $05$ mole of $Y$ is left in the reaction mixture The correct statement(s) about the reaction is(are) (Use : $\ln\,2 = 0693)$

In the decay sequence, ${^{238}_{92}U->[-x_1] ^{234}_{90}Th->[-x_2] ^{234}_{91}Pa ->[-x_3]^{234}Z->[^{-x_4}] ^{230}_{90}Th}$ $x_1,x_2, x_3$ and $x_4$ are particles/radiation emitted by the respective isotopes. The correct option(s) is(are)

For a first order reaction ${A(g) \to 2B(g) + C(g)}$ at constant volume and $300\, K$, the total pressure at the beginning $(t = 0)$ and at time $t$ are $P_0$ and $P_t$, respectively. Initially, only $A$ is present with concentration $[A]0$, and $t_{1/3}$ is the time required for the partial pressure of $A$ to reach $1/3^{rd}$ of its initial value. The correct option(s) is (are) (Assume that all these gases behave as ideal gases)

For the elementary reaction, $M\rightarrow N$, the rate of disappearance of $M$ increases by a factor of $8$ upon doubling the concentration of $M$. The order of the reaction with respect to $M$ is

Plots showing the variation of the rate constant $(k)$ with temperature $(T)$ are given below. The plot that follows Arrhenius equation is

For a first order reaction, $A\rightarrow P$, the temperature $(T)$ dependent rate constant $(k)$ was found to follow the equation: $log\, k= (-2000)\frac {1}{T}+6.0$. The pre-exponential factor $A$ and the activation energy $E_a$, respectively, are

Which one of the following statements) is incorrect about order of reaction?

For a first order reaction, $(A)\to $ product. Concentration of $A$, changes from $0.1\, M$ to $0.025 \,M$ in $40$ minutes the rate of reaction of when concentration of $A$ is $0.01 \,M$ is :

In first order reaction, the concentration of reactant decreases from $800\, mol\, cm ^{-3}$ to $50\, mol\, cm ^{-3}$ in $2 \times 10^{4} s$. The rate constant is

Consider the chemical reaction, $N_2(g)+3H_2(g)\rightarrow 2NH_3(g)$ .The rate of this reaction can be expressed in terms of time derivatives of concentration of $N_2(g), H_2(g) or NH_3(g)$. Identify the correct relationship amongst the rate expressions

If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process.$AB + hv\rightarrow$ AB, for the rate of formation of AB is directly proportional to

The following statement (s) is are correct

For the first order reaction,

$^{27}_{13}AI$ is a stable isotope, $^{29}_{13}AI$ is expected to decay by

The half-life period of a radioactive element is 140 days. After 650 days, one gram of the element will reduce to

A catalyst is a substance which

The rate constant of a reaction depends on