Which of the following is not an intermolecular redox reaction?

M g C O_{3} ⟶ M g O + C O_{2}

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O_{2} + 2 H_{2} ⟶ 2 H_{2} O

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K + H_{2} O ⟶ K O H + (1 / 2) H_{2}

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M n {B r}_{3} ⟶ M n {B r}_{2} + (1 / 2) {B r}_{2}

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Solution

The correct option is A $M g C O_{3} ⟶ M g O + C O_{2}$
The reactions are as follows:
$M g C O_{3} ⟶ M g O + C O_{2}$
+2 +2
$O_{2} + 2 H_{2} ⟶ 2 H_{2} O$
0 0 +1 -2
$K + H_{2} O ⟶ K O H + (1 / 2) H_{2}$
0 +1 0
$M n {B r}_{3} ⟶ M n {B r}_{2} + (1 / 2) {B r}_{2}$
+3 +2 0
As intermolecular redox reaction and redox reactions are same, only A is not a redox reaction.

Suggest Corrections

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