Question

Why is salt used as a preservative in many foods?

A) Salt prevents many food‑spoiling organisms from growing.

B) Salt binds proteins and inhibits cell division of food-spoiling organisms.

C) Salt is highly toxic to most food‑spoiling organisms.

D) Salt masks the pungent taste of spoiled food.

Answer 1

A) salt prevents many food spoiling-organisms from growing.

We know that the bacteria spreads with the help of water. Salt will dehydrate the food by osmosis. There will be net movement of water towards the salt and food gets dehydrated. So, the bacteria can not spread without water. Also adding salt will cause loss of water from bacterial cell causing their death. This will lead to the retardation of the microbial growth.

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