1.

Which of the following statement is/are true ?

Answer»

`Cu^(2+)` salts form soluble complex with excess KCN
`Cu^(2+)` salts form soluble complex with AQUEOUS AMMONIA
`Cu^(2+)` salts form soluble complex with KI
A piece of iron or zinc when place in `Cu^(2+)` salt solution, precipitates copper

Solution :( C) is INCORRECT as with `Kl, Cu^(2+)` salts form a WHITE precipitate of `Cu_2I_2 and I_2` gas is liberated.


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