Question

the sealed packets of fried food are filled with nitrogen.why?

Answer 1

The packets of fried food are filled with nitrogen to lock in the freshness and increase its fresh life. The nitrogen keeps the food fresh and crispy for a long time.

Answer 2

sealed packets of fried food are filled with nitrogen .Because, to protect the food from rancidity.
Rancidity can can be prevented by packaging fat and oil containing foods in nitrogen gas.