Question

define corrosion what are the conditions necessary for corrosion

Answer 1

When a metal is attacked by its surrounding substances such as air , moisture , acid ,etc , it is said to be corroded and this process is called corrosion . 

Conditions necessary - Keeping the substance or a metal in open .

Answer 2

Hello Dost ☺

Answer :

Corrosion – The process of slow conversion of metals into their undesirable compounds due to their reaction with oxygen, water, acids, gases etc. present in the atmosphere is called corrosion.

Rusting – Iron when reacts with oxygen and moisture forms red substance called rust.

Rancidity – The taste and odour of food materials containing fat and oil changes when they are left exposed to air for long time. This is called rancidity.

It is caused due to oxidation of fat and oil present in food material.

It can be prevented by using various methods such as by adding antioxidants to the food materials, Storing food in air tight container and by flushing out air with nitrogen.

Thanks ☺