Question

why salt is used as preservative for some food items. explain, why?

Answer 1

Hence salt is used as a preservative. Any bacteria or fungi (microorganisms that spoil food) require water for reproduction and growth. Salting the food removes the moisture and water content thereby preventing the growth of mould etc. on the food substance. ... Basically, salt works by drying food.

Answer 2

Salt is used because most bacteria, fungi and other potentially pathogenic organisms cannot survive in a highly salty environment, due to the hypertonic nature of salt.