Question

Explain any two methods used to preserve food​

Answer 1

Answer:

pasteurization is the best method for food preservation

Explanation:

A student focused the image of a candle flame on a white screen using a convex lens.He noted down the position of the candle,screen and the lens as under, Position of candle=12.0 cm Position of convex lens=50.0 cm Position of screen=88.0 cm a)What is the focal length of the convex lens? b)Where will the image be formed if he shifts the candle towards the lens at a position of 31.0 cm?

Answer 2

Answer:

=> Common salt as preservative-

common salt is used to preserve meat and fish.

salting is also used to preserve raw mangoes etc.

=> Sugar as preservative-

Jams, jellies and squashes are preserved using sugar.

Sugar reduces the moisture content which inhibits the growth of food spoiling microbes.