JEE MAIN - Chemistry (2023 - 25th January Morning Shift - No. 22)
For the first order reaction A $$\to$$ B, the half life is 30 min. The time taken for 75% completion of the reaction is _________ min. (Nearest integer)
Given : log 2 = 0.3010
log 3 = 0.4771
log 5 = 0.6989
Answer
60
Explanation
Time taken for $75 \%$ completion
$=2 \times \mathrm{t}_{1 / 2}$
$=2 \times 30$
$=60 \mathrm{~min}$
$=2 \times \mathrm{t}_{1 / 2}$
$=2 \times 30$
$=60 \mathrm{~min}$
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