JEE Advanced 2022 Paper 2 Q16 Chemistry Inorganic Chemistry p-Block Elements (Groups 15-18) Medium

JEE Advanced 2022 Paper 2 · Q16 · p-Block Elements (Groups 15-18)

The reaction of HClO$_3$ with HCl gives a paramagnetic gas, which upon reaction with O$_3$ produces

  1. A. Cl$_2$O
  2. B. ClO$_2$
  3. C. Cl$_2$O$_6$
  4. D. Cl$_2$O$_7$
Reveal answer + step-by-step solution

Correct answer:C

Solution

Step 1 — identify the paramagnetic gas. HClO$_3$ + HCl $\rightarrow$ Cl$_2$ + ClO$_2$ + H$_2$O. The paramagnetic gas is ClO$_2$ (chlorine dioxide, an odd-electron molecule with 1 unpaired electron — paramagnetic).

Step 2 — ClO$_2$ + O$_3$ $\rightarrow$ Cl$_2$O$_6$ + O$_2$ (dichlorine hexoxide). Detailed stoichiometry: 2 ClO$_2$ + 2 O$_3$ $\rightarrow$ Cl$_2$O$_6$ + 2 O$_2$.

Product = Cl$_2$O$_6$. Option (C).

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