NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Analyzing +4 | -1

An aqueous solution of

\mathrm{FeS}{\mathrm{O}_4},\mathrm{A}{\mathrm{l}_2}{\left( {\mathrm{S}{\mathrm{O}_4}} \right)_3}

and chrome alum is heated with excess of

\mathrm{N}{\mathrm{a}_2}{\mathrm{O}_2}

and filtered. The materials obtained are:

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Correct option: C

A yellow filtrate and a brown residue

Option C (A yellow filtrate and a brown residue) is correct because

\mathrm{FeS}{\mathrm{O}_4}

forms iron(III) oxide (brown residue) and chrome alum forms sodium chromate (yellow filtrate) in the presence of excess

\mathrm{N}{\mathrm{a}_2}{\mathrm{O}_2}

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