Determine the oxidation number of underlined atoms in following :

$8 K C l - - - O_{3} + 24 H C l \to + 8 K C l - - - + 12 H_{2} O + 9 {C l - - -}_{2} + 6 C l - - - O_{2}$

+ 5, - 1, 0, + 4

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+ 5, - 1, 0, + 2

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+ 4, - 1, 0, + 5

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None of these

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Solution

The correct option is A $+ 5, - 1, 0, + 4$
Let X be the oxidation number of Cl in $K C l O_{3}$
$1 + X + 3 (- 2) = 0$
$X = + 5$

Let X be the oxidation number of Cl in $K C l$
$1 + X = 0$
$X = - 1$

Let X be the oxidation number of Cl in ${C l}_{2}$
$2 X = 0$
$X = 0$

Let X be the oxidation number of Cl in $C l O_{2}$
$X + 2 (- 2) = 0$
$X = + 4$

The oxidation number of underlined atoms in $8 K C l - - - O_{3} + 24 H C l \to + 8 K C l - - - + 12 H_{2} O + 9 {C l - - -}_{2} + 6 C l - - - O_{2}$ are $+ 5, - 1, 0, + 4$ respectively.

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