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A blue colouration is not obtained when...

A blue colouration is not obtained when

A

Ammonium hydroxide dissolves in copper sulphate

B

Copper sulphate solution reacts with `K_(4)[Fe(CN)_(6)]`

C

Ferric chloride reacts with sodium ferrocyanide

D

Anhydrous `CuSO_(4)` is dissolved in water

Text Solution

Verified by Experts

The correct Answer is:
B
`CuSO_(4)+K_(2)[Fe(CN)_(6)] rarr" no reaction"`
`4NH_(4)OH+CuSO_(4)rarrunderset("Deep blue")([Cu(CH_(3))_(4)])SO_(4)+4H_(2)O`
`underset("Anhhydrous")(CuSO_(4))+5H_(2)Orarrunderset("Blue")(CuSO_(4)).5H_(2)O`
`4FeCl_(3)+3Na_(4)[Fe(CN)_(6)]rarrunderset("(Prussian blue)")underset("Ferric ferrocyanide")(Fe_(4)[Fe(CN)_(6)])+12NaCl`
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