JEE Advanced 2022 — Paper 2 — CHEM-III solution

JEE Advanced2022Paper 2CHEM-III

The reaction of HClO $_{3}$ with HCl gives a paramagnetic gas, which upon reaction with O $_{3}$ produces

Solution

HClO $_{3}$ + HCl undergo comproportionation: $2 HClO_{3} + 2 HCl \to 2 ClO_{2} + Cl_{2} + 2 H_{2} O$ .

ClO $_{2}$ has an odd number of valence electrons (one unpaired electron) and is the paramagnetic gas.

ClO $_{2}$ reacts with ozone to give dichlorine hexoxide: $2 ClO_{2} + 2 O_{3} \to Cl_{2} O_{6} + 2 O_{2}$ .

Hence the product is Cl $_{2}$ O $_{6}$ : option (C).

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