A) \[36g\]
B) \[48g\]
C) \[12g\]
D) \[24g\]
Correct Answer: B
Solution :
Half life of a radioactive isotope,\[{{t}_{1/2}}=3\]days Therefore, 12 days \[=4\times {{t}_{1/2}}\] \[3gm\xrightarrow{{{t}_{1/2}}}6gm\xrightarrow{{{t}_{1/2}}}12gm\xrightarrow{{{t}_{1/2}}}24gm\]\[\xrightarrow{{{t}_{1/2}}}48gm\] Initial wt. 1 day 2nd day 3rd day 4th day.
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