1
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Find the average rate of formation $$\mathrm{O}_{2(\mathrm{~g})}$$ in the following reaction.

$$\begin{aligned} & 2 \mathrm{NO}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{NO}_{(\mathrm{g})}+\mathrm{O}_{2(\mathrm{~g})} \\ & {\left[-\frac{\Delta[\mathrm{NO}]}{\Delta \mathrm{t}}\right]=x \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~s}^{-1}} \end{aligned}$$

A
$$\frac{\mathrm{x}}{2} \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$
B
$$x \mathrm{~mol} ~\mathrm{dm}^{-3} \mathrm{~s}^{-1}$$
C
$$2 x~ \mathrm{mol} ~\mathrm{dm}^{-3} \mathrm{~s}^{-1}$$
D
$$4 x ~\mathrm{mol} ~\mathrm{dm}^{-3} \mathrm{~s}^{-1}$$
2
MHT CET 2023 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which from following is the slope of the graph of rate versus concentration of the reactant for first order reaction?

A
$$-\mathrm{k}$$
B
$$\mathrm{k}$$
C
$$\frac{\mathrm{k}}{2.303}$$
D
$$\frac{-\mathrm{k}}{2.303}$$
3
MHT CET 2023 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the amount of reactant in percent that remains after 60 minutes involved in first order reaction. $$\left(\mathrm{k}=0.02303\right.$$ minute $$\left.^{-1}\right)$$

A
$$25 \%$$
B
$$75 \%$$
C
$$50 \%$$
D
$$12.5 \%$$
4
MHT CET 2023 9th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The rate for reaction $$\mathrm{A}+\mathrm{B} \rightarrow$$ product, is $$1.8 \times 10^{-2} \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$. Calculate the rate constant if the reaction is second order in $$\mathrm{A}$$ and first order in $$\mathrm{B}$$. ($$[\mathrm{A}]=0.2 \mathrm{M} ;[\mathrm{B}]=0.1 \mathrm{M}$$)

A
$$9.0 \mathrm{~mol}^{-2}~\mathrm{dm}^6 \mathrm{~s}^{-1}$$
B
$$18.0 \mathrm{~mol}^{-2} ~\mathrm{dm}^6 \mathrm{~s}^{-1}$$
C
$$4.5 \mathrm{~mol}^{-2} ~\mathrm{dm}^6 \mathrm{~s}^{-1}$$
D
$$16.0 \mathrm{~mol}^{-2} ~\mathrm{dm}^6 \mathrm{~s}^{-1}$$
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