Calculate the oxidation number of underlined elements in the following compounds:
$C a (C - - l O_{2})_{2}$

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Solution

The correct option is C 3
Let oxidation number of Cl be 'x' in $C a (C l O_{2})_{2}$
$charge on O = - 2$
$charge on C a = + 2$
$\Rightarrow 2 + 2 x + 4 \times - 2 = 0$
$\Rightarrow x = + 3$

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