1.

Which of the following statements 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 KI, `Cu^(2+)` salts form a WHITE precipitate of `Cu_2I_2 and I_2` gas is liberated.


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