At any instant, the ratio of the amount of radioactive
substances is 2 : 1. If their half lives be respectively 12 and
16 hours, then after two days, what will be the ratio of the
substances ?
(a) 1 : 1 (b) 2 : 1 (c) 1 : 2 (d) 1 : 4
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Answer:
(a) 1 : 1
N A :N B =1:1
Explanation:
......
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