When a reagent (X) reacts with Fe3+ salt solution turns red due to the formation of a compound (Y). This reagent causes no change in colour with Fe2+ salt solution. Compound (X) and (Y) are respective

Question

When a reagent (X) reacts with Fe3+ salt solution turns red due to the formation of a compound (Y). This reagent causes no change in colour with Fe2+ salt solution. Compound (X) and (Y) are respectively :

Prashant Kotian · Accepted Answer

Correct answer: A. Step 1: Separation of iron(III) hydroxide from aluminium hydroxide relies on their difference in amphoteric character. Step 2: Al(OH)3 is amphoteric and dissolves in excess sodium hydroxide (NaOH) to form soluble sodium aluminate (Na[Al(OH)4]), whereas Fe(OH)3 is purely basic and remains insoluble. Step 3: Therefore, adding NaOH solution successfully separates them by dissolving only Al(OH)3, leaving Fe(OH)3 as a precipitate, which matches option (c).

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