A) 32 min
B) 48 min
C) 12 min
D) 24 min
Correct Answer: B
Solution :
\[\frac{N}{{{N}_{o}}}={{\left( \frac{1}{2} \right)}^{\frac{T}{{{t}_{1/2}}}}}\]; \[\left( \frac{1}{16} \right)={{\left( \frac{1}{2} \right)}^{\frac{192}{{{t}_{1/2}}}}}\]; \[{{\left( \frac{1}{2} \right)}^{4}}={{\left( \frac{1}{2} \right)}^{\frac{192}{{{t}_{1/2}}}}}\] \[{{t}_{1/2}}=48\,\min \]
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