Question

Ans C which processes are responsible for a and b

Answer 1

Answer:

1.The coating of iron with metals is one of the most important of the means employed for this purpose; tin and zinc being the metals most frequently used.

2.Food products containing fats and oils are packaged in nitrogen so that there is no oxygen to cause oxidation of food and make it rancid.

3. Nitrogen is an inert gas which is flushed in food items as it does not react with food items and removes all the oxygen present in food. Oxygen present in food items makes then rancid due to the presence of oils and fats. Nitrogen is chemically nonreactive with oils and fats so it preserves the oily food items.

Hence, oil and fat containing food items are flushed with nitrogen

Explanation:

1.Another class of substances are paints, tar, linseed oil, etc., which form coatings upon the surface of iron and thus isolate it from oxygen.