1.

Which of the following combinations in an aqueous medium will give a blue colour or precipitate

Answer»

`Fe^(2+)+[Fe(CN)_(6)]^(3-)`
`Fe^(3+)+[Fe(CN)_(6)]^(4-)`
`Co^(2+)+SCN^(-)`
`Fe^(3+)+SCN^(-)`

SOLUTION :Due to formation CORRESPONDING COMPLEX


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