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Q.

The half value period of a radioactive nuclide is 3hours. In 9 hours, its activity will be reduced to

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a

1/9

b

1/27

c

1/6

d

1/8.

answer is D.

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Detailed Solution

n=93=3 NN0=(12)n=(12)3=18 Thus activity reduces to 18 th.
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