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1
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 $$^{-1}$$
2
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
$$\frac{-\mathrm{k}}{2.303}$$
3
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$$^{-1}$$
4
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The rate law for the reaction $$\mathrm{A}+\mathrm{B} \rightarrow \mathrm{C}$$ at $$25^{\circ} \mathrm{C}$$ is given by rate $$=k[A][B]^2$$. Calculate the rate of reaction if rate constant at same temperature is $$6.25 \mathrm{~mol}^{-2} \mathrm{~dm}^6 \mathrm{~s}^{-1}[[\mathrm{~A}]=1 \mathrm{M},[\mathrm{B}]=0.2 \mathrm{M}]$$

A
$$0.25 \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$
B
$$0.5 \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$
C
$$0.75 \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$
D
$$1.25 \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$
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