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Explain the action of chlorine on a litmus paper.

Explain the action of chlorine on a litmus paper.

Answers

- Moist chlorine turns litmus paper red then bleaches it.
- Dry chlorine turns damp blue litmus paper red then bleaches it.
- Moist chlorine bleaches red litmus paper; dry chlorine bleaches damp red litmus paper.
- Dry chlorine has no effect on dry litmus paper.
Reasons:
(i). In presence of moisture chlorine forms chlorine water which is acidic and hence turns blue litmus paper red.
(ii). Hypochlorous acid in the chlorine water is an oxidizing agent; thus adds oxygen (oxidizes) to the colour of most dyes; hence bleaching it.

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Kavungya answered the question on April 29, 2019 at 09:25

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