Give reasons why salt is used as preservative in food.

Following are the reasons for using salt as a preservative:

● Salt removes the moisture content by osmosis process. Since moisture is the internal factor responsible for the spoilage of food, removal of water by salt prevents spoilage of food.

● Salt prevents the growth of the bacteria which are mainly responsible for spoilage of food by removing the moisture of food and also due to high salt content change in the pH take place due to which bacteria find hard to grow in food having high salt content and thus spoilage is prevented.