The bleaching action of chlorine gas is effective due to the presence of
hydrogen chloride
water
air
oxygen
0
Explanation: Chlorine does not bleach by itself directly. In the presence of water, it reacts to form nascent oxygen (\(\ce{[O]}\)), which is a very powerful oxidizing agent responsible for the bleaching effect:
\(\ce{Cl2 + H2O -> HCl + [O]}\)
This nascent oxygen destroys the coloring matter (organic dyes, pigments), making chlorine an effective bleaching agent only when moisture is present.
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