1
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which type of reaction order is followed by radioactive processes?

A
0
B
1
C
2
D
1.5
2
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

For the reaction, $$3 \mathrm{I}_{(\mathrm{aq})}^{-}+\mathrm{S}_2 \mathrm{O}_{8(\mathrm{aq})}^{2-} \longrightarrow \mathrm{I}_{3(\mathrm{aq})}^{-}+2 \mathrm{SO}_{4(\mathrm{aq})}^{2-}$$, rate of formation of $$\mathrm{SO}_4^{2-}$$ is $$0.022 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{sec}^{-1}$$. What is rate of formation of $$\mathrm{I}_{3(\mathrm{aq})}^{-}$$ ?

A
$$0.022 \mathrm{~mol} ~\mathrm{dm}^{-3} \mathrm{sec}^{-1}$$
B
$$0.11 \mathrm{~mol} ~\mathrm{dm}^{-3} \mathrm{sec}^{-1}$$
C
$$0.011 \mathrm{~mol} ~\mathrm{dm}^{-3} \mathrm{sec}^{-1}$$
D
$$0.033 \mathrm{~mol} ~\mathrm{dm}^{-3} \mathrm{sec}^{-1}$$
3
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Instantaneous rate of a reaction is $$ - {1 \over 2}{{d[x]} \over {dt}} = - {{d[y]} \over {dt}} = {1 \over 2}{{d[z]} \over {dt}}$$, identify the reaction.

A
$$x - 2y \to 2z$$
B
$$2x + y \to 2z$$
C
$$2z + y \to 2x$$
D
$$2x - 2y \to z$$
4
MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Half life for a first order reaction is 6.93 hour. What is the time required for 80% completion of the reaction?

A
12 hours
B
18 hours
C
6 hours
D
16 hours
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