Question

In canning, if the air in the head space is displaced with nitrogen, the gas is considered as a chemical preservative added to the food.

(a) True

(b) False

This question was addressed to me during an interview.

I need to ask this question from Principles of Chemical Preservation of Food-1 in chapter Principles of Chemical Preservation of Food, Principles of Food Irradiation and Food Quality factors of Food Engineering

Answer 1

Right answer is (b) False

Explanation: In canning, if the air in the head space is displaced with nitrogen, the gas is NOT considered as a chemical preservative added to the food. This is because every chemical added to food during the process of fabrication is not a food preservative.