Question

$F{e}^{2+}$ ion is distinguished from $F{e}^{3+}$ ion by :

• A. $BaC{l}_2$
• B. $KCN$
• C. $NaN{O}_3$
• D. $N{H}_{4}SCN$

Answer 1

Answer: (D)

The chemical compounds to be distinguished should give different colouration with reagent.

$F{e}^{2+}+N{H}_{4}SCN⟶$ No Change in colour

$F{e}^{3+}+N{H}_{4}SCN⟶$ Red colouration

$\therefore N{H}_{4}SCN$ is used to distinguish between $F{e}^{2+}$ and $F{e}^{3+}$