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The number of unpaired electrons in the ...

The number of unpaired electrons in the following gaseous ion:
`Mn^(3+),Cr^(3+),V^(3+) and Ti^(3+)` and `Ti^(3+)` are `4,3,2` and 1 respectively
Statement: `Cr^(3+)`is most stable in aqeous solution among these ions.

A

Statement-1 is true, Statement-2 is True, Statement-2 is a correct explanation for statement-1

B

Statement-1 is true, Statement-2 is True, Statement-2 is Not a correct explanation for statement-1

C

Statement-1 is true, Statement-2 is False

D

Statement-1 is False, Statement-2 is True

Text Solution

Verified by Experts

`Mn^(3+)=[Ar]^(18)3d^(4),Cr^(+3)=[Ar]^(18),V^(3+)=[Ar]^(18)3d^(2),Ti^(3+)=[Ar]^(18)3d^(1)`
`Cr^(3+)` is most stable in aqueous solution because it has half filled `t^(3)_(2g)`energy level of `3d` orbitals in octahedral crystal filed spliting and according to crystal filed theory (CFT) it has highest value of `CFSE` i.e. `1.2Delta_(0)`
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Statement-1 : The number of paired electrons in the following gaseouos ions Mn^(3+) , Cr^(3+) , V^(3+) and Ti^(3+) are 4,3,2 and 1 respectively. Statement-2 : Cr^(3+) is most stable in aqueous solution among these ions. (A) Statement-1 is True, Statement-2 is True: Statement-2 is a correct explanation for Statement-1. (B) Statement-1 is True, Statement-2 is True: Statement-2 is NOT a correct explanation for Statement-1. (C) Statement-1 is True, Statement-2 is False (D) Statement-1 is False, Statement-2 is True

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