Question

the different of preservation colour the wrapper of frozen and canned food item and milk​

Answer 1

Answer:

Clue - Lists of some food and likely

preservatives used.

Packed Food                                            Preservatives

Tomato sauce                                 -          Sodium Benzoate

Sorbets                                          

-          Citric acid

Jams                                                -         Citric Acid/ Sorbates / Benzoates

Cheese, Bread, Baked products, Pickles   -      Sodium/ Calcium Propionate or Sorbates

Carbonated drinks, Fruit juices                  –      Benzoates

Sorbates include calcium/sodium/potassium salt

of Sorbic acid and inhibit yeast and mold but they may be less effective on

bacteria.

Sodium/Calcium Propionate prevent growth of

mold but they are not effective on yeast or bacteria

Sodium Benzoate is used in preservation of

acidic foods to prevent food from molding and also in beverages like fruit

juices and soft drinks. 

Citric acid is used as a food preservative

and is a natural acid found in lemons, limes, plums, grapefruit, oranges. They

are extracted by adding calcium oxide which results in calcium citrate.