Question

18. Why do we apply paint on iron articles?

20. Explain the following terms with one example each corrosion
rancidity​

Answer 1

Answer:

18. When iron is exposed to the environmental condition it terribly reacts with water and air and ends up with iron rusting. Iron articles are therefore painted off so that iron can not react with water and air. This is the way to avoid a reaction which would concurrently stop rusting of iron.

20.Corrosion: It is the process in which metals are slowly eaten up by the action of air moisture or chemicals. ... Rancidity: When the substance containing oils and fats are exposed to air they get oxidised and become rancid due to which their smell, taste and colour change. This process is known as rancidity.

Answer 2

Answer:

this will help you sure