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At two stages of disintegration, disintegration constants are respectively 1×102s1 and 1×105s1. At first stage 2000 atoms are disintegrating. At second stage number of atoms disintegrating would be

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By Expert Faculty of Sri Chaitanya
a
2
b
2×106
c
2×10−6
d
2×109

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detailed solution

Correct option is B

N1λ1=N2λ2N2=N1λ1λ2=2000×1×10−21×10−5=2×106 atoms
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