Bleaching powder is prepared from:

caustic potash

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caustic soda

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slaked lime

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magnesium chloride

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Solution

The correct option is C slaked lime
Bleaching powder is prepared on a large scale basis by passing chlorine gas through a solution of calcium hydroxide ( $C a (O H)_{2}$ ) which is commonly called as slaked lime.
The reaction that occurs is $C a (O H)_{2} + C l_{2} (g) \to C a O C l_{2} + H_{2} O$ .
Bleaching powder is mainly used for bleaching papers and sterilizing water.

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How is Bleaching powder prepared? Give its important uses.

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