Question

.ans both the questions​

Answer 1

a) oxygen is produced on positive electrode as oxygen possesses negative charge. because it is having deficiency of 2 electron.

${o}^{2 - }$

b) Brass is used for electroplating gas burners as Brass is an alloy of copper and zinc, which is corrosion resistant and has a nice antique gold color.

Hope this answer helps you.