(I) Why the taste or smell of fat change when left for a long time? Wh

1.	(I) Why the taste or smell of fat change when left for a long time? What can you do to prevent it?(II) Name the gas used to prevent the chips from getting oxidised?
Answer» (i) When food materials containing fats and oils are left for a long time, they become rancid (i.e) fat and oil present in them get oxidised. The methods which are used to slow down oxidation are: a) Keeping food in air tight container b) Flushing the bags containing food with nitrogen gas c) Refrigerating food also helps to slow down rancidification. (ii) Nitrogen is filled inside of chips packet to make atmosphere inside it as inert to prevent oxidation of chips.

(I) Why the taste or smell of fat change when left for a long time? What can you do to prevent it?(II) Name the gas used to prevent the chips from getting oxidised?

Answer»

(i) When food materials containing fats and oils are left for a long time, they become rancid (i.e) fat and oil present in them get oxidised.

The methods which are used to slow down oxidation are:

a) Keeping food in air tight container

b) Flushing the bags containing food with nitrogen gas

c) Refrigerating food also helps to slow down rancidification.

(ii) Nitrogen is filled inside of chips packet to make atmosphere inside it as inert to prevent oxidation of chips.

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(I) Why the taste or smell of fat change when left for a long time? What can you do to prevent it?(II) Name the gas used to prevent the chips from getting oxidised?

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