1.

Raddish - brown (chocolate ) ppt. is formed with :

Answer»

`Cu^(2+) and Fe(CN)_(4)^(4-)`
`Ba^(2+)` and `SO_(4)^(2+)`
`Pb^(2+)` and `I^(Θ)`
NONE of these

Solution :`Cu_(2)[Fe(CN)_(6)]` is chocolate colour insolublecompound


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