Which of the following equations represents a redox reaction:

H_{2} O_{2} + K O H \to K H O_{2} + H_{2} O

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C r O_{7}^{2 -} + 2 O H^{-} \to 2 C r O_{4}^{2 -} + H_{2} O

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K + O_{2} \to K O_{2}

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C a (H C O_{3})_{2} \to C a C O_{3} + C O_{2} + H_{2} O

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Solution

The correct option is C $K + O_{2} \to K O_{2}$
$K (0) + O_{2} (0) \to K O_{2} (+ 1) (- \frac{1}{2})$

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Similar questions

C u + H N O_{3} \to C u (N O_{3})_{2} + N O_{2}

You are given the following chemical equation :

$M g (s) + C u O (s) ⟶ M g O (s) + C u (s)$

This equation represents :

(a) decomposition reaction as well as displacement reaction

(b) combination reaction as well as double displacement reaction

(d) double displacement reaction as well as redox reaction

{(N H_{4})}_{2} C r_{2} O_{7} ⟶ N_{2} + C r_{2} O_{3} + 2 H_{2} O

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