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Question

Electrodes are immersed in water and electric current is passed through it. Which of the following statements is correct?

A

Oxygen bubbles will be formed at the electrode which is connected to the negative terminal of the battery

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B

Hydrogen gas will be formed at the electrode which is connected to the positive terminal of the battery

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C

No gas is formed at any electrode

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D

Hydrogen gas will be formed at the electrode which is connected to the negative terminal of the battery

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Solution

The correct option is D

Hydrogen gas will be formed at the electrode which is connected to the negative terminal of the battery


H+ ions move towards the electrode which is connected to the negative terminal of the battery, gain electrons and get released as H2 gas. 2H++2eH2

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