The half-life of 1 g of radioactive sample is 9 hour. The radioactive decay obeys first order kinetics. The time required for the original sample to reduce to 0.2 g isA. 15.6 hoursB. 156 hoursC. 20.9 hoursD. 2.09 hours

The half-life of 1 g of radioactive sample is 9 hour. The radioactive

1.	The half-life of 1 g of radioactive sample is 9 hour. The radioactive decay obeys first order kinetics. The time required for the original sample to reduce to 0.2 g isA. 15.6 hoursB. 156 hoursC. 20.9 hoursD. 2.09 hours
Answer» Correct Answer - C `(0.693)/(9) = (2.303)/(t) "log" (1)/(1 - 0.2)`

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The half-life of 1 g of radioactive sample is 9 hour. The radioactive decay obeys first order kinetics. The time required for the original sample to reduce to 0.2 g isA. 15.6 hoursB. 156 hoursC. 20.9 hoursD. 2.09 hours

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