MHT CET 2025 26th April Evening Shift | Chemical Kinetics Question 1 | Chemistry

$$ \begin{aligned} & \mathrm{NO}_2 \mathrm{Cl}_{(\mathrm{g})} \longrightarrow \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{Cl}_{(\mathrm{g})} \text { (slow) } \\ & \mathrm{NO}_2 \mathrm{Cl}_{(\mathrm{g})}+\mathrm{Cl}_{(\mathrm{g})} \longrightarrow \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})} \text { (fast) } \end{aligned} $$

Identify rate law equation for this reaction.

$\mathrm{r}=\mathrm{k}\left[\mathrm{NO}_2 \mathrm{Cl}\right]$

$\mathrm{r}=\mathrm{k}\left[\mathrm{NO}_2\right][\mathrm{Cl}]$

$\mathrm{r}=\mathrm{k}\left[\mathrm{NO}_2\right]^2$

$\mathrm{r}=\mathrm{k}\left[\mathrm{NO}_2 \mathrm{Cl}\right]^2$

MHT CET 2025 26th April Evening Shift

MCQ (Single Correct Answer)

-0

What is the average rate of reaction when change in concentration of product is 0.05 M in 20 seconds?

$0.0025 \mathrm{M} \mathrm{s}^{-1}$

$0.05 \mathrm{M} \mathrm{s}^{-1}$

$1.0 \mathrm{M} \mathrm{s}^{-1}$

$4.0 \mathrm{M} \mathrm{s}^{-1}$

MHT CET 2025 26th April Evening Shift

MCQ (Single Correct Answer)

-0

Identify role of glycerol in following reaction.

$$ 2 \mathrm{H}_2 \mathrm{O}_{2(\ell)} \xrightarrow{\text { glycerol }} 2 \mathrm{H}_2 \mathrm{O}_{(\ell)}+\mathrm{O}_{2(g)} $$

Homogeneous catalyst

Inhibitor

Promoter

Heterogeneous catalyst

MHT CET 2025 26th April Evening Shift

MCQ (Single Correct Answer)

-0

The slope of a graph $\log [A]_1$ versus ' $t$ ' for first order reaction is $-2.5 \times 10^{-3} \mathrm{~s}^{-1}$. Find rate constant of the reaction?

$1.263 \times 10^{-3} \mathrm{~s}^{-1}$

$3.471 \times 10^{-3} \mathrm{~s}^{-1}$

$5.757 \times 10^{-3} \mathrm{~s}^{-1}$

$8.125 \times 10^{-3} \mathrm{~s}^{-1}$

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