1.

Consider the following transformation : 2CuX_(2) overset("Room temperature")(to) 2CuX+X_(2) (uarr) Then X^(-) can be:

Answer»

`F^(-), BR^(-)`
`CL^(-), Br^(-)`
`CN^(-), I^(-)`
`Cl^(-), F^(-)`

Solution :`Cu(CN)_(2) and CuI_(2)` being UNSTABLE spontaneously decomposes into `CuCN(darr) and CUI(darr)` RESPECTIVELY at room temperature.


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