In electrolysis of water to obtain oxygen, which of the following is not used?

Inert electrodes

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Acidified water

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Direct Current

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Alternating Current

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Solution

The correct option is C Alternating Current
Inert electrodes, acidified water, and direct current are used in the electrolysis of water.

The alternating current would not be appropriate for electrolysis. Because the "cathode" and "anode" constantly switch places in case of alternating current.

So, the correct option is $D$ .

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