Question

Write about food preservation methods.

Answer 1

1. Drying: It is the removal of water content from the food by drying it in the sunlight.
   E.g. Grains.

2. Addition of salt: When salt is added to food, it removes the water from the food.
   E.g. Fish, Pickles.

3. Addition of sugar: When sugar is added to food, it dissolves in the water content of the food and preserves the food items from spoilage.
   E.g. Jam, Fruit juices.

4. Freezing: The microbial growth and the enzyme activity on the frozen food items can be prevented by this method. E.g. Fruits, Vegetables.

5. Boiling: It kills the micro-organisms present in the food materials.
   E.g. Milk, Water.

6. Canning and bottling: In this method, food is packed in airtight cans so that germs do not grow on them.
   E.g. Milk powder.
   Addition of chemical

7. preservatives: Chemical preservatives are added to stop the growth of micro-organisms in certain food materials.
   E.g. Sodium benzoate is added with fruits, Sulphur dioxide is added with dry fruits, Vinegar is added with pickles.