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Why is the amount of gas collected in on...

Why is the amount of gas collected in one of the test tubes in Activity 1.7 double of the amount collected in the other? Name this gas.

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During the electrolysis of water, hydrogen and oxygen get separated by the electricity. Water `(H_(2)O)` contains two parts hydrogen and one part of oxygen. Since hydrogen goes to one test tube and oxygen goes to another, the amount of gas collected in one of the test tubes is double of the amount collected in the other.
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A group of students carried out electrolysis of acidified water in the laboratory. By the end of the experiment two gases were collected in the test tubes at both the electrodes. The gas collected in one test tube is double the volume of gas collected in the other. Name this gas. Give reason for your answer.

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