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If .(92)U^(235) assumed to decay only by...

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)`

A

`""_(89)^(225)Ac`

B

`""_(89)^(227)Ac`

C

`""_(89)^(230)Ac`

D

`""_(89)^(231)Ac`

Text Solution

Verified by Experts

The correct Answer is:
B
By emission of `alpha` or `beta`–particles, mass number reduce in the multiple of 4.
`235 to 231 to 227 to 223`
On only option (b) and (d) are possible. `""_(89)Ac^(231)` is not possible since on emitting one `alpha`- particle the atomic no. will reduced to 90.` (92 to 90)`
So only `""_(89)Ac^(227)` is possible
`""_(92)U^(235)overset(2alpha)to ""_(88)X^(227) overset(beta)to ""_(89)Ac^(227)`
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