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  • A → B The above reaction is of zero order. Half life of this reaction is 50 min. The time taken for the concentration of A to reduce to one-fourth of its initial value is__________ (

A → B

The above reaction is of zero order. Half life of this reaction is 50 min. The time taken for the concentration of A to reduce to one-fourth of its initial value is__________ (Nearest integer) min.

Option: 1

75


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

Assume reaction starts with 1 mole A

\left(\mathrm{t}_{1 / 2}=\frac{\mathrm{a}}{2 \mathrm{k}}, \mathrm{K}=\frac{1}{2 \times 50}\right)

For 75% completion

\begin{aligned} & \mathrm{a}-\frac{\mathrm{a}}{4}=\mathrm{kt} \\ & \mathrm{t}=\frac{3}{4} \frac{\mathrm{a}}{\mathrm{k}}=\frac{3}{4} \times \frac{100}{\mathrm{a}}=75 \end{aligned}

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Kshitij

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