If `._(92)U^(235)` assumed to decay only by emitting two `alpha`-and one `beta`-particles, the possible product of decays is a)`._(89)Ac^(231)` b)`._(89)Ac^(235)` c)`._(89)Ac^(236)` d)`._(89)Ac^(227)`

Options

A. `._(89)^(235)Ac`
B. `._(89)^(227)Ac`
C. `._(89)^(230)Ac`
D. `._(89)^(231)Ac`

Answer

B

Explanation

`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