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Questions  

Alpha particle decay is possible if

a
rest mass of the original (parent) nucleus is lesser than the sum of the rest masses of the alpha  particle and the daughter nucleus.
b
rest mass of the original (parent) nucleus is greater than the sum of the rest masses of the alpha particle and the daughter nucleus.
c
rest mass of the original (parent) nucleus is equal to the sum of the rest masses of the alpha particle and the daughter nucleus
d
rest mass of the original (parent) nucleus is zero.

detailed solution

Correct option is B

For the alpha decay Q>0

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