1.

Which of the following complexes formed by Cu^(2+) ions is most stable ?

Answer»

`CU^(2+)+4NH_(3)IFF[Cu(NH_(3))_(4)]^(2+),log K=11.6`
`Cu^(2+)+4CN^(-)iff[Cu(CN)_(4)]^(2-)log K=27.3`
`Cu^(2+)+2eniff[Cu(en)_(2)]^(2+), logK=15.4`
`Cu^(2+)+4H_(2)Oiff[Cu(H_(2)O)_(4)]^(2+), logK=8.9`

SOLUTION :Higher the log K value, greater is the stability


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