1.

Which change in [Mn(CN)_(6)]^(4-) results in symmetrical ditribution of electrons in non-degenerate d- orbitals of metal ion ? (P) [Mn(CN)_(6)]^(4-)underset(byO_(2))overset("oxidation")to [Mn(CN)_(6)]^(3-) (Q) [Mn(CN)_(6)]^(4-)underset(by Zn)overset("reduction")to [Mn(CN)_(6)]^(5-)

Answer»

<P>P only
Q only
P and Q both
None of these

Solution :`[overset(+2)Mn(CN)_(6)]^(5-) implies d^(5), t_(2G)^(2, 2, 2)e_(G)^(0, 0)`
`[overset(+1)Mn(CN)_(6)]^(5-) implies d^(6), t_(2g)^(2, 1, 1)e_(g)^(1, 1)`
[Due to low O.S. of `Mn(+1) Delta_(0) lt P`, hence, pairing does not occur.]


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