Question

Short Answer Type-l Questions
1. In electrolysis of water, why is the volume of gas collected over one electrode almost double the gas collected over the other electrode? Name the gas collected on each electrode.
2. Translate the following into chemical equation and then balance:
(a) Aluminium hydroxide reacts with sulphuric acid to form aluminium sulphate and water.
(b) Ammonia reacts with copper oxide to give copper metal, water and nitrogen gas.
3. Why are decomposition reactions called the opposite of combination reactions? Explain with example.​

Answer 1

Answer:

(a) 2Al(OH) 3+3H2SO4 == Al2(SO4)3+6H2O

(b) 2NH3+3CuO== 3Cu+3H2O+N2

Answer 2

Answer:

1. as chemical formula of water is H2O, which means two atoms of hydrogen and one atom of oxygen are present in one molecule of water.thus is why the amount of gas collected in one test just double the amount of gas in another