Identify strongest oxoacid of halogen from following.

Identify strongest oxoacid of halogen from following.
  1. Hypochlorous acid
  2. Chlorous acid
  3. Chloric acid
  4. Perchloric acid

Solution

Increasing order of acid strength is: $\mathrm{HOCl} < \mathrm{HClO}_2 < \mathrm{HClO}_3 < \mathrm{HClO}_4$ Hence, perchloric acid $\left(\mathrm{HClO}_4\right)$ is the strongest acid, among the oxoacids of chlorine.

Asked in: MHT CET 2023 (10 May Shift 1)

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