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For [CrCl(3).xNH(3)], elevation in b.pt ...

For `[CrCl_(3).xNH_(3)]`, elevation in `b.pt` of one molal solution is triple of one molal aqueous solution of urea. Assuming `100%` ionisation of complex molecule, calculated the value of `x`.

A

(a) `4`

B

(b) `5`

C

( c) `6`

D

(d) None of these

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaT_(b) "for" CrCl_(3).xNH_(3)=DeltaT_(b)` for `"urea"xx2`, Thus complex `CrCl_(3).xNH_(3)` must furnish two ions i.e., it should be `[CrCl_(2).xNH_(3)]Cl`. Also co-ordination number of `Cr` is six, thus `x=4` and complex is `[Cr(NH_(3))_(4)Cl_(2)]Cl`.
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