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MolSynapse / Question bank / p-Block Elements: Groups 17 and 18 / Halogen compounds: HX, oxoacids, bleaching powder

JEE Main levelOne or more correct optionsDifficulty 2 of 3ph032

Select the correct statement(s) about bleaching powder.

AIt is prepared by the action of $Cl X_{2}$ on dry slaked lime.
BIt is a mixed salt, $Ca (OCl) Cl$ .
CDilute acids liberate $Cl X_{2}$ from it.
DIts available chlorine is usually about 70 per cent.

Answer: A, B, C

A, B and C are correct: the compound contains

OCl X^{-}

and

Cl X^{-}

, and

OCl X^{-} + Cl X^{-} + 2 H X^{+} \to Cl X_{2} + H X_{2} O

. D is wrong because the available chlorine in good bleaching powder is only about 35-38 per cent.

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