1.

Plutonium decays with a half-life of 24000 years. If the plutonium is stored for 72000 years, then the fraction of plutonium that remains is                                         [CPMT 1999; MH CET 2003]

A.            \[\frac{1}{2}\]                      
B.            \[\frac{1}{3}\]
C.            \[\frac{1}{4}\]                      
D.            \[\frac{1}{8}\]
Answer» E.


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