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 \[=Initial\text{ }activity\times {{\left( \frac{1}{2} \right)}^{n}}\] Used half-life time (n) \[=\frac{Total\text{ }time}{{{T}_{1/2}}}=\frac{24}{6}=4\] So, 0.01 = Initial activity \[\times {{\left( \frac{1}{2} \right)}^{4}}\] Initial activity \[=0.1\times 1.6=0.16\]
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