P-Block Elements Ques 522
Question: An aqueous solution of $ FeSO_4,Al_2{{(SO_4)}_3} $ and chrome alum is heated with excess of $ Na_2O_2 $ and filtered. The materials obtained are:
Options:
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
Show Answer
Answer:
Correct Answer: C
Solution:
The filtrate is yellow due to $ CrO_4^{2-} $ ion and residue is brown due to $ Fe{{( OH )}_3}. $
