1
MHT CET 2024 15th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

For a reaction $\mathrm{r}=\mathrm{k}[\mathrm{A}][\mathrm{B}]^2$, if concentration of $A$ is doubled the rate of reaction

A
increases by 2
B
increases by 4
C
decrease by $\frac{1}{2}$
D
decreases by 2
2
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

For the reaction

$$\begin{aligned} & 2 \mathrm{NO}_{(\mathrm{s})}+2 \mathrm{H}_{2(\mathrm{~g})} \longrightarrow \mathrm{N}_{2(\mathrm{~g})}+2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{s})} \\\\ & \text { rate }=\mathrm{k}[\mathrm{NO}]^2\left[\mathrm{H}_2\right] . \end{aligned}$$

What is the order of reaction with respect to $\mathrm{H}_2$ and overall order of reaction respectively?

A
$0,2$
B
$1,3$
C
$2,1$
D
$3,1$
3
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following statements is NOT true about rate constant?

A
It is independent of concentration.
B
It varies with temperature.
C
For unit concentration it is equal to rate of reaction.
D
It is directly proportional to the product of concentrations of reacting species.
4
MHT CET 2024 15th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A first order reaction takes 40 minute for $20 \%$ decomposition. Calculate its rate constant.

A
$5.6 \times 10^{-3}$ minute $^{-1}$
B
$4.5 \times 10^{-3}$ minute $^{-1}$
C
$6.5 \times 10^{-3}$ minute ${ }^{-1}$
D
$7.2 \times 10^{-3}$ minute $^{-1}$
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