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Chemical Kinetics

JEE Main level, single correct, medium

1 of 4

Question 1 of 4

For a first order reaction, the time required for $99.9\%$ completion is related to its half-life $t_{1/2}$ by:

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Answer: (A) $t_{99.9\%} = 10 t_{1/2}$

t_{99.9\%} = \frac{2.303}{k} \log\left(\frac{100}{0.1}\right) = \frac{2.303}{k} \times 3 = 3 \times \frac{2.303 \times 0.3010}{k \times 0.3010} \approx 10 t_{1/2}

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JEE Main 2025 Apr 2 Shift 1 question paper

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JEE Main Chemistry practice question on Chemical Kinetics, with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.

For a first order reaction, the time required for 99.9%99.9\%99.9% completion is related to its half-life t1/2t_{1/2}t1/2​ by:

JEE Main question paper PDF

More Chemistry practice

For a first order reaction, the time required for $99.9\%$ completion is related to its half-life $t_{1/2}$ by: