Unit 7 The P Block Elements (Intext Questions-13)
Intext Questions
7.29 Give the reason for bleaching action of $\mathrm{Cl_2}$.
Answer When chlorine reacts with water, it produces nascent oxygen. This nascent oxygen then combines with the coloured substances present in the organic matter to oxide them into colourless substances. $\mathrm{Cl_2}+\mathrm{H_2} \mathrm{O} \longrightarrow 2 \mathrm{HCl}+[\mathrm{O}]$ Coloured substances $+[O]$ Oxidized colourless substance
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Answer
Two poisonous gases that can be prepared from chlorine gas are
(i) Phosgene $\left(\mathrm{COCl_2}\right)$
(ii) Mustard gas $\left(\mathrm{ClCH_2} \mathrm{CH_2} \mathrm{SCH_2} \mathrm{CH_2} \mathrm{Cl}\right)$
