Do they add sugar to skimmed milk to make it taste better?

Chemicals are added as preservatives to milk to increase the keeping quality of milk.The commenest preservatives were boric acids and borates, formaline or formaldehyde, hydrogen peroxide and to a less extend salicylic and benzoic acid.

NOTE:According to Milk and Dairies Act , it is illegal to add any preservatives or other substance to milk.