First slide

Group-17 or Halogen family

Question

Which one of the following salts will evolve halogen on treatment with conc. H₂SO₄?

Moderate

A

NaCl
B

CaCl₂
C

NaBr
D

KI

Solution

$\underset{conc.}{2 NaBr} + \underset{}{H_{2} {SO}_{4}} ⟶ 2 {NaHSO}_{4} + {Br}_{2} 2 KI + H_{2} {SO}_{4} ⟶ 2 {KHSO}_{4} + I_{2} ↑$

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