Question

(a) Explain the term "rancidity."
Name the type of chemical reaction responsible for causing rancidity and define it.
(b) Write three methods for preventing rancidity of food.


CBSE Class X Science LA (5 Marks)

Answer 1

(a) When fats and oiLs are oxidised, the food becomes rancid i.e., their smell and taste changes. The type of chemical reaction is oxidation.

Definition : Rancidity is the proces.s of slow oxidation of oil and fat present in the food materials resulting in the production of foul odour and taste in them.

(b) Methods to Prevent Rancidity :

(i)  Refrigeration of cooked food at low temperatures.

(ii) Packing of fond materials in air tight containers.

(iii) By adding antioxidants e.g., BHA (Butylated hydroxyanisole)

Answer 2

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