Bleaching powder is obtained, when slaked lime reacts with ______.

$NaOH$

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${NaHCO}_{3}$

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${Cl}_{2}$

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$H_{2}$

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Solution

The correct option is C
${Cl}_{2}$

${CaOCl}_{2}$ is bleaching powder.
It is obtained by the reaction between slaked lime and chlorine.

$C a (O H)_{2} (a q) + C l_{2} (g) \to C a O C l_{2} (a q) + H_{2} O (l)$

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Bleaching powder is prepared by passing chlorine gas over dry slaked lime.

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