Q.

(A): Average oxidation number of chlorine in bleaching powder is zero.(R): Oxidation number of chlorine is always zero.

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a

Both A and R are true and R is the correct explanation

b

Both A and R are true but R is not the correct explanation of A

c

A is true but R is false

d

A is false but R is false

answer is C.

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Detailed Solution

Bleaching powder : Ca(OCl)ClOxidation number of Cl bonded to Oxygen is +1 as Oxygen is more electronegative than Cl Oxidation number of Cl bonded to metal is - 1Average oxidation number of Cl =  -1+12=ZeroChlorine can exhibits -1 ,0 , +1 ,+3 ,+5,+7
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