1.

Which one of these is not known?

Answer»

`CuCl_(2)`
`CuI_(2)`
`CuF_(2)`
`CuBr_(2)`

Solution :All FOUR copper (II) halides are known except cupric iodide `(CUI_(2))` which rapidly decomposes to cuprous iodide, `Cu_(2)I_(2)` and `I_(2)`
`2CuI_(2) RARR Cu_(2)I_(2)+I_(2)`


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