Question

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.​

Answer 1

Explanation:

In activity 1.7, electricity is passed through water to decompose it. The amount of gas collected in cathode is twice that of at anode. The gas collected at cathode is hydrogen while the gas collected at anode is oxygen. Since the hydrogen and oxygen combine in the ration 2: 1 to form a water molecule, the amount of hydrogen gas is double that of oxygen.

or

Water contains two parts of hydrogen and one part oxygen. Therefore, during the electrolysis of water the amount of hydrogen has collected in one of the test tubes is double than that of the oxygen produced and collected in the other last tube.

Answer 2

Answer:

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In Activity 1.7, water is electrolysed to give H2 gas at one electrode and O2 gas at the other electrode.

In Activity 1.7, water is electrolysed to give H2 gas at one electrode and O2 gas at the other electrode.2H2O(l) → 2H2(g) + O2(g)

In Activity 1.7, water is electrolysed to give H2 gas at one electrode and O2 gas at the other electrode.2H2O(l) → 2H2(g) + O2(g)Thus two molecules of water on electrolysis give two molecules of hydrogen gas and one molecule of oxygen gas or in other words the amount of hydrogen gas collected would be double than that of oxygen gas.