Question

An aqueous solution $FeSO_4 . Al_2(SO_4 )_3$ and chrome alum is heated with excess of $Na_2 0_2$ and filtered. The materials obtained are

• A. a colourless filtrate and a green residue
• B. a yellow filtrate and a green residue
• C. a yellow filtrate and a brown residue
• D. a green filtrate and brown residue

Answer 1

Answer: (C)

a yellow filtrate and a brown residue

Answer 2

Yellow filtrate contains $Cr0_5$ and brown residue contain $Fe_2 0_3.$