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03/01/2022 1:44 pm
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An aqueous solution of FeSO4, Al2(SO4)3 and chrome alum is heated with excess of Na2O2 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 a brown residue
1 Answer
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03/01/2022 1:46 pm
Correct answer: (c) a yellow filtrate and a brown residue
Explanation:
The filtrate is yellow due to CrO42- ion and residue is brown due to Fe(OH)3.