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Forum Question Bank10g of a radioactive isotope is reduced to 1.25…

MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryChemical kineticsDifferential and Integral Forms of Rate Law

10g of a radioactive isotope is reduced to 1.25 g in 12 yr. Calculate the half-life period of the isotope.

A.4 yr✓ Correct

B.3 yr

C.8 yr

D.24 yr

Explanation

1/2 1/2 1/2 t t t 1/2 1/2 10g 5g 2.5g 1.25g 3 t 12yr 12 t 4 yr 3 -> -> -> x

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