Qualitative Analysis - Result Question 18
####18. An aqueous solution $FeSO _4 \cdot Al _2\left(SO _4\right) _3$ and chrome alum is heated with excess of $Na _2 O _2$ and filtered. The materials obtained are
(1996, 1M)
(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
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Answer:
Correct Answer: 18. (c)
Solution:
- Yellow filtrate contains $CrO _5$ and brown residue contain $Fe _2 O _3$.
