1.

An aqueous solution of FeSO_(4),Al_(2)(SO_(4))_(3) and chrome alum is heated with excess of Na_(2)O_(2) and filtered. The materials obtained as

Answer»

A COLOURLESS FILTRATE and a green residue
A YELLOW filtrate and a green residue
A yellow filtrate and a brown residue
A green filtrate and a brown residue

Solution :Yellow filtrate is due to chromate ions `(CrO_(4)^(- -))` and green residue to due to `Fe(OH)_(2)`.


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