JEE Main 2024 — Practical Chemistry Question with Solution
JEE Main 2024 (04 Apr Shift 1)
Question
In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :
Choose an option
Show full solutionCorrect option: D
Correct answer
Ddecrease concentration of ions
Step-by-step explanation
$\begin{aligned}
& \mathrm{NH}_4 \mathrm{OH} \rightleftharpoons \mathrm{NH}_4^{+}+\mathrm{OH}^{-} \\
& \mathrm{NH}_4 \mathrm{Cl} \rightarrow \mathrm{NH}_4^{+}+\mathrm{Cl}
\end{aligned}\mathrm{NH}_4^{+}$,
decreases in such extent that only group-III cation can be precipitated, due to their very low in the range of .
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