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Question

The oxidation state of Cl in CaOCl2 (bleaching powder) is/are:

A
+1 only
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B
-1 only
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C
+1 and -1
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D
None of the above
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Solution

The correct option is C +1 and -1
Bleaching powder CaOCl2 can be represented as:
Ca(OCl)Cl from which we can determine the . O.S of Cl
O.S of Ca is +2 and O is -2
Hence,
CaOCl2Ca+2+(OCl)+Cl
In OCl if O.S of Cl is x then
-2 + x =-1
So x = +1
and in Cl O.S is -1
Hence Bleaching powder has both +1 and -1 O.S of Cl

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