If \[2.0\,g\] of a radioactive isotope has a half-life of 20 hr, the half-life of \[0.5g\] of the same substance is [MP PMT 1990; MNR 1992]

If \[2.0\,g\] of a radioactive isotope has a half-life of 20 hr, the h

1.	If \[2.0\,g\] of a radioactive isotope has a half-life of 20 hr, the half-life of \[0.5g\] of the same substance is [MP PMT 1990; MNR 1992]
A.	20 hr
B.	80 hr
C.	5 hr
D.	10 hr
Answer» B. 80 hr

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If \[2.0\,g\] of a radioactive isotope has a half-life of 20 hr, the half-life of \[0.5g\] of the same substance is [MP PMT 1990; MNR 1992]

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