SELECT * FROM question_mgmt as q WHERE id=3487 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=252 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Chemical reaction and Equation why is the amount of gas collected in one of the t

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:

Electrolysis of water is carried out in this activity. In which electric current is passed through water with sulphuric acid.

2H2O(l)     →      2H2(g)      +      O2(g)

The gas collected over cathode is Hydrogen and the gas collected over anode is Oxygen.

Volume of H2 gas is double than that of  O2 gas collected over anode. Through a balanced chemical equation, its clear that  two molecules of hydrogen and one molecule of oxygen evolved.


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