Chips bags contain which gas ?

Chips bags contain which gas ?

Oxygen
Hydrogen
Carbon dioxide
Nitrogen
This question was previously asked in
UPSC CISF-AC-EXE – 2021
Chips bags are filled with nitrogen gas. Nitrogen is an inert gas that helps prevent oxidation of the chips, which causes them to become stale and rancid. It also provides cushioning, protecting the fragile chips from breaking during transport and handling.
Nitrogen gas is inert, meaning it does not react readily with the food.
Oxygen would react with the fats in the chips, causing rancidity.
The gas also helps maintain the structural integrity of the chips.
This process of flushing food packaging with an inert gas is called Modified Atmosphere Packaging (MAP) and is commonly used for various food products to extend shelf life.