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1
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Find the rate of formation of $$\mathrm{NO}_{2(\mathrm{~g})}$$ in the following reaction.

$$\begin{aligned} & 2 \mathrm{~N}_2 \mathrm{O}_{5(\mathrm{~g})} \rightarrow 4 \mathrm{NO}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})} \\ & {\left[\frac{-\mathrm{d}\left[\mathrm{N}_2 \mathrm{O}_5\right]}{\mathrm{dt}}=0.02 \mathrm{~mol} \mathrm{~dm}^{-3}\right]} \end{aligned}$$

A
$$0.01 \mathrm{~mol} \mathrm{~dm}^{-3}$$
B
$$0.02 \mathrm{~mol} \mathrm{~dm}^{-3}$$
C
$$0.03 \mathrm{~mol} \mathrm{~dm}^{-3}$$
D
$$0.04 \mathrm{~mol} \mathrm{~dm}^{-3}$$
2
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the rate constant of the first order reaction if $$20 \%$$ of the reactant decomposes in 15 minutes.

A
$$1.488 \times 10^{-2}$$ minute $$^{-1}$$
B
$$1.881 \times 10^{-2}$$ minute $${ }^{-1}$$
C
$$1.984 \times 10^{-2}$$ minute $$^{-1}$$
D
$$1.18 \times 10^{-2}$$ minute $$^{-1}$$
3
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which from following is the slope of the graph of $$[\mathrm{A}]_{\mathrm{t}}$$ versus time for zero order reaction?

A
$$-\mathrm{k}$$
B
$$\mathrm{k}$$
C
$$\frac{\mathrm{k}}{2.303}$$
D
$$\frac{-\mathrm{k}}{2.303}$$
4
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A first order reaction takes 23.03 minutes 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
$$9.69 \times 10^{-3}$$ minute$$^{-1}$$
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