1.

Assertion: Bleaching powder reacts with dilure acids to evolve chlorine Reason: The chlorine liberated by the action of dilute acids on bleaching powder is called avilable chlorine .

Answer»

if both ASSERTION and reason are true and reason is THR correct explanationof assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reson are false.

Solution :The reaction involved is
`CaOCl_2+H_2SO_4 RARR CaSO_4 + H_2O+cl_2`
The available CHLORINE may be difined as the % of chlorine leiberated when one mole of bleaching powder (127 G) is treated with excess of diute `h_2SO_4`


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