Question

(a) Give two methods to prevent the rusting of air.
(b) What is thermite reaction? How is it used to join the railway tracks or
cracked machine parts?
(c) Name the method used to extract metals of high reactivity.​

Answer 1

Answer:

1. by applying paint on iron articles.
2. by doing galvanization method .

the reaction of Fe2O3 with al Is known as thermite reaction.

it is used in joining the cracks as large amount of heat is released which melt the metals and help in joining the cracks .

electrolysis.