Question

ln what ways food go bad?In what ways can food be preserved?

Answer 1

Due to microbial and bacterial attack the food get spoiled .
We can preserve the food by:
1.Sun drying
2.Cooling in refrigerator
3.Salting
4.Chemical preservatives like, sodium benzaote

Answer 2

Often food becomes bad and has bad odour due to rancidity.This occurs when the compounds are oxidised in the presence of air.

How are they preserved :

• Packets of Potato chips contains nitrogen gas filled in it to prevent rancidity
• Foods are stored in sealed vacuumed container

• Antioxidants are added to food.

Hope this helps :)