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CGP EDU Academic Team
Published on: August 13, 2026
When a blue litmus is dipped into a solution of hypochlorous acid, it turns red and then gets decolourised. Explain.
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HOCl acts as an acid, HOCl ⎯→ H + + OCl – , and thus turns blue litmus to red. It also work as bleaching agent, HOCl ⎯→ HCl + [O], and the red litmus is decolorized by nascent oxygen.
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