Chemical Kinetics Question 167

Question: For a first order reaction $ A\to $ product, the rate of reaction at $ [A]=0.2mol{l^{-1}} $ is $ 1.0\times {10^{-2}}mol{l^{-1}},{{\min }^{-1}} $ . The half life period for the reaction is [Roorkee 1999]

Options:

A) 832 s

B) 440 s

C) 416 s

D) 13.86 s

Show Answer

Answer:

Correct Answer: D

Solution:

$ r=K $ [reactant]
$ \therefore K=\frac{1.0\times {10^{-2}}}{0.2}=0.05 $

$ {t_{1/2}}=\frac{0.693}{0.05}=13.86,s $



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