1.

A blue colouration is not obtained when

Answer»

ammonium hydroxide dissolves in COPPER SULPHATE
copper sulphate SOLUTION reacts with `K_(4)[Fe(CN)_(6]`
Ferric chloride reacts with sod. FERROCYANIDE.
anhydrous `CuSO_4` is dissolved in water.

Solution :`2CuSO_(4) + K_(4)[Fe(CN)_6] rarr underset("Chocolate PPT")(Cu_2 [ Fe(CN)_6] + 2K_2SO_4)`


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