An aqueous solution of $$FeS{O_4},A{l_2}{\left( {S{O_4}} \right)_3}$$ and chrome alum is heated with excess of $$N{a_2}{O_2}$$ 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 a brown residue
Answer :
a yellow filtrate and a brown residue
Solution :
The filtrate is yellow due to $$CrO_4^{2 - }\,ion$$ and residue is brown due to $$Fe{\left( {OH} \right)_3}.$$
Releted MCQ Question on Inorganic Chemistry >> P - Block Elements
Releted Question 1
The reddish brown coloured gas formed when nitric oxide is oxidised by air is