`Cu^(2+)` ions will be reduced to `Cu^(+)` ions by the addition of an aqueous solution of:
`Cu^(2+)` ions will be reduced to `Cu^(+)` ions by the addition of an aqueous solution of:
A. `Kl`
B. `KCl`
C. `KSCN`
D. `KCN`
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Correct Answer - A,C,D
`2CuSO_(4)+4Kl to 2"Cul" darr("white")+2K_(2)SO_(4)+l_(2)`
`3SCN^(-)+Cu^(2+) to CuSCN darr ("white")+(SCN)_(2)`
`6CN^(-)+Cu^(2+) to [Cu(CN)_(4)]^(3-)+(CN)_(2)`
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