name two acids used to preserve food
Acetic acid in the form of Vinegar and Benzoic acid is used in preservation of food.
Sodium salts of some acids are very useful as food preservatives. Suggest a few such acids.
Name any two special chemicals which are used as food preservatives.
Name two food materials which can be preserved by using sugar.
Which of two - Oxygen or Nitrogen, can be used as refrigerent to preserve foods? Why ?