NEET UG CHEMISTRY MCQ: CHEMICAL KINETICS

1 Hard

1 of 1

Analyzing +4 | -1

Consider the two hypothetical reactions given below:

I

a A \rightarrow

Products,

k=x \mathrm{~mol}^{-1} \mathrm{~L} \mathrm{~min}^{-1}

b B \rightarrow

Products,

k=y \mathrm{~min}^{-1}

The half-lives of both the reactions are the same, equal to

1 \mathrm{hr}

when molar concentration of the reactant is

1.0 \mathrm{M}

in each case. If these reactions are started at the same time taking

1 \mathrm{M}

of the reactant in each case, the ratio

[A]/[B]

after

3 \mathrm{hr}

will be:

View answer and explanation

Correct option: D

The correct answer is D (2) because the ratio [A]/[B] after 3 hours can be calculated based on the rate laws and half-lives of the two reactions.

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