1.

Which of the following complexes is least likely to exist ?

Answer»

`Hg(OH)_(4)^(2-)`
`ZN(OH)_(4)^(2-)`
`HgI_(4)^(2-)`
`PtCl_(4)^(2-)`

SOLUTION :`Hg^(2+)` is soft while `OH^(-)` is hard.


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