Q72 / 160 · JIPMER 2007 · Chemistry

The correct order of acid strength is

  • Correct answer
    A
    $\mathrm{HClO} \lt \mathrm{HClO}_2 \lt \mathrm{HClO}_3 \lt \mathrm{HClO}_4$
  • B
    $\mathrm{HClO}_4 \lt \mathrm{HClO} \lt \mathrm{HClO}_2 \lt \mathrm{HClO}_3$
  • C
    $\mathrm{HClO}_2 \lt \mathrm{HClO}_3 \lt \mathrm{HClO}_4 \lt \mathrm{HClO}$
  • D
    $\mathrm{HClO}_4 \lt \mathrm{HClO}_3 \lt \mathrm{HClO}_2 \lt \mathrm{HClO}$

Solution

Correct order of acid strength $\underset{+1}{\mathrm{HClO}} \lt \underset{+3}{\mathrm{HClO}_2} \lt \underset{+5}{\mathrm{HClO}_3} \lt \underset{+7}{\mathrm{HClO}_4}$ Acid strength $\propto$ oxidation number.

Hence, the correct answer is option: 'A'.

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