1.

If it is assumed that ._(92)^(235)U decays only by emitting alpha and beta-particles, the possible product of the decay is

Answer»

`._(89)^(235)Ac`
`._(89)^(227)Ac`
`._(89)^(230)Ac`
`._(89)^(231)Ac`

Solution :`n_(alpha) = (DeltaA)/(4)` (`DeltaA` change in mass no)
`DeltaA` is divisible by 4 in options (B) and (d)
In option (d), `n_(alpha) =1`
`:. n_(beta) = DELTA Z - 2n_(alpha) = 3 - 2 =1`, which is not possible


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