Which is the correct combination of products collected over anode and cathode respectively in order to prepare hydrogen by electrolysis of water?

O_{2}, H_{2}

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H_{2}, O_{2}

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N a, O_{2}

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O_{2}, N a

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Solution

The correct option is A $O_{2}, H_{2}$
Electrolysis of water is the decomposition of water $(H_{2} O)$ into oxygen $(O_{2})$ and hydrogen gas $(H_{2})$ due to an electric current being passed through the water.

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During electrolysis of acidulated water, which gas is collected at cathode and which gas is collected at anode?

H_{2} S O_{4}

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