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STANDARDChemistry-Chemical Kinetics

STANDARD Chemistry First Order Reactions MCQ Question

Type: MCQ-numerical-Medium-Class 12

Half-life period of a first order reaction is 10 min. What percentage of the reaction will be completed in 100 min?

A

25%

B

50%

C

99.9%

D

75%

Correct Answer

Option C

Detailed Explanation

For a first order reaction, the percentage completion can be calculated using the formula: t1/2t=0.693log⁡aa−x\frac{t_{1/2}}{t} = \frac{0.693}{\log \frac{a}{a-x}}. Substituting the given values, we find that 99.9% of the reaction is completed in 100 min.

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