A) 8.2 h
B) 5.2 h
C) 1.2 h
D) 2.4 h
Correct Answer: C
Solution :
Key Idea: \[{{t}_{1/2}}=0.693/\lambda \] Given, \[\lambda =0.58\,{{h}^{-1}},\lambda =?\] \[{{t}_{1/2}}=\frac{0.693}{0.58}\] \[=1.19\text{ }h=1.2\text{ }h\]
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