Question

Why are the chips packets filled with nitrogen gas?

Answer 1

Hi,

When the food materials prepared in oils and fats are kept for a long time, they start giving unpleasant smell and taste. The fat and oil containing food materials which have unpleasant smell and taste are said to have become rancid. This happens due to oxidation of oils and fats by the oxygen present in air.

Chips are also prepared in oils and fats. When the chips are surrounded by unreactive gas nitrogen, there is no oxygen of air to cause its oxidation and make it rancid. If packets are filled with air or oxygen then the chips would decompose over time to give unpleasant taste and smell.