The half life period of a first order chemical reaction

Question:

The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be (log 2 = 0.301) :-

  1. 46.06 minutes

  2. 460.6 minutes

  3. 230.3 minutes

  4. 23.03 minutesĀ 


Correct Option: , 2

Solution:

$\mathrm{k}=\frac{0.693}{\mathrm{t}_{1 / 2}}=\frac{0.693}{6.93}=0.1 \mathrm{~min}^{-1}$

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