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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class12  >>  Atoms
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There are two radioactive substances X & Y . If Decay constant of Y is 2 times of X . Initially both have equal number of nuclei . Then after n half lives of X rate of disintegration of both are equal . The value of n is

$(a)\;1\qquad(b)\;4\qquad(c)\;3\qquad(d)\;5$

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