1.

Among the following complexes (K - P) : K_(3) [Fe(CN)_(6)] - K , [Co(NH_(3))_(6)]Cl_(3)- L , Na_(3)[Co("oxalate")_(3)]-M , [Ni(H_(2)O)_(6)]Cl_2 - N, K_(2) [Pt(CN)_(4)]-O and [Zn(H_(2)O)_(6)] (NO_(3))_(2)-P, the diamagnetic complexes are

Answer»

K , L , M , N
K , M , O , P
L , M , O, P
L , M , N , O

Solution :For COMPLEXES L and M , i.e, `[Co(NH_(3))_(6)]^(3+)` and `[Co("OX")_(3)]^(3-)`
`Co^(3+) (3D^(6)) is d^(2) sp^(3)` hybridised .

For complex K , i.e, `[Fe(CN)_(6)]^(3-) , Fe^(3+) (3d^(5)) is d^(2) sp^(3)` hybridised .

For complex O i.e., `[PT(CN)_(4)]^(2-)` ,
`Pt^(2+) (5d^(8)) is DSP^(2)` hybridised.

For complexP , i.e, `[Zn(H_(2)O)_(6)]^(2+)`
`Zn^(2+) (3d^(10)) is sp^(3) d^(2)` hybridised .

For complex N, i.e., `[Ni(H_(2)O)_(6)]^(2+)` ,
`Ni^(2+) (3d^(8)) is sp^(3) d^(2)` hybridised .

Hence , complexes L, M , Oand P are diamagnetic .


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