Q25 / 150 · MHT CET 2025 (22 Apr Shift 2) · Chemistry

Which of the following is the molecular formula of halous acid of chlorine?

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

Solution

The oxyacids of chlorine include hypochlorous acid $\mathrm{HClO}$, chlorous acid $\mathrm{HClO}_2$ (also known as halous acid), chloric acid $\mathrm{HClO}_3$, and perchloric acid $\mathrm{HClO}_4$.

Halous acid corresponds specifically to chlorous acid, whose molecular formula is $\mathrm{HClO}_2$.

Final answer: B

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

Relevant Questions