1.

Blue coloured compound is obtained when :

Answer»

`Fe^(2+)` ions react with POTASSIUM ferrocyanide
`Fe^(3+)` ions react with potassium ferrocyanide
`Fe^(3+0` ions react with potassium ferrocyanide
`Fe^(3+)` ions react with potassium sulphocyanide .

SOLUTION :`4FeCl_3 + underset("Pot. Ferrocyanide")(3K_4[Fe(CN)_6]) to underset("Deep blue colouration")(Fe_4[Fe(CN)_6]) + 12 KCl `


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