Question

12. In the electrolysis of water
1. Name the gas collected at the cathode and the anode
2. Why the volume of one collected at one electrode is double than that at another
Name the type of chemical reaction...​

Answer 1

Answer:

Explanation:

When electric current is passed through water , it decomposes to give hydrogen gas and oxygen gas.

                ELECTRICITY

2H₂O(I) ---------------------------- > 2H₂(g) + O₂(g)

At cathode :

H+ ions will gain electrons and form Hydrogen gas  

2H⁺ +2e--->H2 (g)

At anode : Oxygen gas will be released  

4 OH⁻(aq)→O2(g) + 2 H2O(l) + 4 e−

II) The volume of hydrogen gas collected at cathode is more than volume of oxygen gas at anode because water is made up of 2 parts of hydrogen and 1 part of oxygen by volume.

this type of reaction is called electric decomposition reaction.

Answer 2

Answer:

In the electrolysis of water the gas collected at cathode is hydrogen and the gas collected at anode is oxygen.

This is because water contains two parts of element as compared to one part of oxygen element by volume

the type of chemical reaction---> Redox reaction