Question

(1) why do we paint objects made up of iron ? (2) why is nitrogen gas filled in food packets containing oil and fats ?(3) which processes are responsible for (a) and (b) ?​

Answer 1

Explanation:

we paint objects made up of iron because to protect them from rusting . galvanisation and zinc layer is used for this purpose

nitrogen gas is filled in the food packets containing oil and fats to prevent the food from becoming rancid. i.e. to prevent rancidity. when the food comes in contact with oxygen they get oxidise and produce bad smell.to prevent this nitrogen and helium is used.

a) rusting

b) oxidation

Answer 2

Answer:

1. To prevent from rusting as iron objects reacts with the oxygen of air and corrode .

2. To prevent the food from being oxidised with the outer atmosphere and prevent the food from being spoiling called rancidity .

Oxidation process..