Which of the following statements is incorrect $-$

Which of the following statements is incorrect $-$
  1. $\mathrm{O}_{3}$ is used as disinfectant
  2. $\mathrm{NO}_{2}$ is oxidised to $\mathrm{N}_{2} \mathrm{O}_{5}$ by $\mathrm{O}_{3}$
  3. $\mathrm{O}_{3}{ }^{-}$is paramagnetic in nature
  4. Dry iodide reacts with ozone and form $\mathrm{I}_{2} \mathrm{O}_{5}$

Solution

(A) Correct statement
(B) $2 \mathrm{NO}_{2}+\mathrm{O}_{3} ightarrow \mathrm{N}_{2} \mathrm{O}_{5}+\mathrm{O}_{2}$
(C) $\mathrm{O}_{3}{ }^{-}$is paramagnetic
(D) $2 \mathrm{I}_{2}+9\left[\mathrm{O}_{3}ight] ightarrow$ $\mathrm{I}_{4} \mathrm{O}_{9}$ (yellow solid) $+9 \mathrm{O}_{2}$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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