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PART - 1 CH - 2 Acids, Bases and Salts — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10SciencePART - 1 CH - 2 Acids, Bases and Salts3 Marks
Question
Write a short note on bleaching powder.###Explain the preparation of bleaching powder with chemical equation and also write its uses.
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Answer

Preparation : Bleaching powder is produced by the action of chlorine on dry slaked lime (Ca(OH)2).
$Cl _2+ Ca ( OH )_2 \longrightarrow CaOCl _2+ H _2 O$
→ Bleaching powder is represented as CaOCl2 and its chemical name is calcium oxychloride.
Uses: (1) For bleaching cotton and linen in the textile industry, for bleaching wood pulp in paper industries and for bleaching washed clothes in laundry.
(2) As an oxidising agent in many chemical industries.
(3) For disinfecting drinking water and making it free from germs.

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