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Q.
Bleaching powder is obtained by the action of chlorine gas and
AIPMTAIPMT 1988The s-Block Elements
Solution:
Bleaching powder is prepared by passing chlorine gas over dry slaked lime $Ca(OH)_2$ by Hesenclaver method or by Bachmann method.
$Ca(OH)_2 + CI_2 \longrightarrow CaOCI_2 + H_2O$