Test for Nitrogen in Air

Q.

Rancidity can be prevented by:

1. Adding antioxidants

2. Storing food away from light

3. Keeping food in the refrigerator

4. All of these

Q.

To preserve food items, we flush them with nitrogen or keep them in the refrigerator. Why?

Q.

How does keeping food inside a refrigerator help in preserving it?

Q.

The constituent of air that supports combustion is __________

1. Nitrogen
2. carbon-di-oxide
3. Oxygen
4. 
   

   water vapour

Q.

Nitrogen is used in the food packaging industry because it _________

1. provides colour to the food
2. provides oxygen to the food
3. adds proteins and minerals to the food
4. keeps the food fresh