Electrolysis of water is which type of reaction?

Endothermic

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Decomposition

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Combination

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Both

A

and

B

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Solution

The correct option is D Both $A$ and $B$
Electrolysis of water is the decomposition of water into oxygen and hydrogen gas due to the passage of an electric current through water.

It is an endothermic reaction because electrical energy is absorbed during this decomposition reaction.

Therefore, electrolysis of water is both a decomposition reaction and an endothermic reaction.

$H_{2} O e l e c t r i c c u r r e n t - -------- \to H_{2} + O_{2}$

Hence, option (D) is correct.

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