Chemical Kinetics

Given the hypothetical reaction mechanism $A\overset{I}{\longrightarrow\,}B\overset{\mathrm{II}}{\longrightarrow\,}C\overset{\mathrm{III}}{\longrightarrow\,}D\overset{\mathrm{IV}}{\rightarrow\,}E$ and the rate as…

For a reaction $A\rightarrow\,B,$enthalpy of reaction is $-4.2\mathrm{kJ}\mathrm{mol}^{-1}$ and enthalpy of activation is $9.6\mathrm{kJ}\mathrm{mol}^{-1}.$The correct potential energy profile for the reaction is shown…

The given graph is a representation of kinetics of a reaction. The $y$ and $x$ axes for zero and first order reactions, respectively are

The rate of a first-order reaction is $0.04moll^{-1}s^{-1}$ at $10$ second and $0.03moll^{-1}s^{-1}$ at $20$ seconds after initiation of the reaction. The half-life period of the reaction is:

What is the correct difference between first and second order reactions?

Mechanism of a hypothetical reaction $X_{2}+Y_{2}\rightarrow\,2\mathrm{XY}$ is given below: (i) $X_{2}\rightarrow\,X+X\left(\mathrm{fast}\right)$ (ii) $X+Y_{2}\rightleftharpoons\,\mathrm{XY}+Y\left(\mathrm{slow}\right)$…

When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is:

Consider the following data for the given reaction $2\mathrm{HI}_{(g)}\rightarrow\,H_{2(g)}+I_{2(g)}$ $\begin{matrix} \mathrm{HI}\left(\mathrm{molL}^{-1}\right) & 0.005 & 0.01 & 0.02 \end{matrix}$ Rate…

The rate of first order reaction is $0.04\mathrm{mol}L^{-1}s^{-1}$ at $10$ minutes and $0.03\mathrm{mol}L^{-1}s^{-1}$at $20$ minutes after initiation. Half life of the reaction is ______ minutes. (Given…

The half-life of ${ }^{65} \mathrm{Zn}$ is 245 days. After $x$ days, $75 \%$ of original activity remained. The value of $x$ in days is $\_\_\_\_$. (Nearest integer) (Given: $\log 3=0.4771$ and $\log 2=0.3010$)

Time required for \(99.9 \%\) completion of a first order reaction is _______ times the time required for completion of \(90 \%\) reaction.(nearest integer)

$t_{87.5}$is the time required for the reaction to undergo $87.5%$ completion and $t_{50}$is the time required for the reaction to undergo $50%$ completion. The relation between $t_{87.5}$and $t_{50}$for a first order…