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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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The gas which is collected in double the amount in the electrolysis of water experiment is hydrogen. This is because water `(H_(2)O)` contains two parts of hydrogen element as compared to one part of oxygen element by volume.
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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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