A) 0.08
B) 0.04
C) 0.16
D) 0.32
Correct Answer: C
Solution :
Remaining activity = 0.01 M after 24 h Remaining activity = Initial activity \[\times {{\left( \frac{1}{2} \right)}^{n}}\] Used half- life time \[(n)\] \[=\frac{\text{Total}\,\text{time}}{{{\text{T}}_{\text{1/2}}}}=\frac{24}{6}=4\] So, 0.01 = Initial activity \[\times {{\left( \frac{1}{2} \right)}^{4}}\] Initial activity \[=0.01\times 16=0.16\]
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