SATHEE: P-Block Elements Ques 522

P-Block Elements Ques 522

Question: An aqueous solution of $F e S O_{4}, A l_{2} {(S O_{4})}_{3}$ and chrome alum is heated with excess of $N a_{2} O_{2}$ 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 $C r O_{4}^{2 -}$ ion and residue is brown due to $F e {(O H)}_{3} .$

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P-Block Elements Ques 522

Question: An aqueous solution of FeSO4,Al2(SO4)3 and chrome alum is heated with excess of Na2O2 and filtered. The materials obtained are:

Options:

Answer:

Solution:

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Question: An aqueous solution of $F e S O_{4}, A l_{2} {(S O_{4})}_{3}$ and chrome alum is heated with excess of $N a_{2} O_{2}$ and filtered. The materials obtained are: