A) \[1.44{{s}^{-1}}\]
B) \[0.72\times {{10}^{-3}}{{s}^{-1}}\]
C) \[1.44\times {{10}^{-3}}{{s}^{-1}}\]
D) \[2.88\times {{10}^{-3}}{{s}^{-1}}\]
Correct Answer: C
Solution :
For first order reaction \[{{t}_{1/2}}=\frac{0.693}{k}\] \[8=\frac{0.693}{k}\] \[k=\frac{0.693}{8}=0.087\,{{\min }^{-1}}\] \[=1.44\times {{10}^{-3}}{{s}^{-1}}\]
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