Milk can be preserved by adding a few drops of

Assertion (A): Food can be preserved by adding salt. Reason (R): Salt increases the moisture content in which microorganisms are unable to grow.

Hydrogen peroxide can preserved by adding a small amount of

Food material can be preserved at

How milk is changed into curd, if a few drops of curd is added to it? What is the reason for its sourness ?

The spoilage of food can be prevented by adding preservatives like-

Which indicator will produce a pink colour on adding a few drops of sodium hydroxide solution?