🛠️ JEE🧪 Chemistry

When \(Mn{O}_{2}\) and \({H}_{2}S{O}_{4}\) is added to a salt (A), the greenish yellow gas liberated as salt (A) isEndFr…

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When \(Mn{O}_{2}\) and \({H}_{2}S{O}_{4}\) is added to a salt (A), the greenish yellow gas liberated as salt (A) isEndFragment

[JEE Main 2024, 04 Apr (Shift 2)]

a

\({\mathrm{CaI}}_{2}\)

b

\(\mathrm{NaBr}\)

c

\({\mathrm{KNO}}_{3}\)

d

\({\mathrm{NH}}_{4}\mathrm{Cl}\)

✓ Correct answer: d)

\({\mathrm{NH}}_{4}\mathrm{Cl}\)

Explanation

The greenish-yellow gas is chlorine (Cl₂).

MnO₂ + H₂SO₄ (conc.) generates nascent oxidizing conditions and can oxidize chloride ions (Cl⁻) to chlorine gas.

Reaction: 2Cl⁻ → Cl₂ (greenish-yellow gas)

Among the options, only NH₄Cl contains chloride ions.

So, NH₄Cl → Cl⁻ → Cl₂ (gas formed)

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