What happens when food materials containing fats and oils are left for a long time? List two observable changes and suggest three ways by which this phenomenon can be prevented.

Food items containg fats and oils give foul smell when left for a long time because of …………………………

What is rancidity ? Mention any two ways by which rancidity can be prevented.

What is rancidity? Mention only two ways by which rancidity can be prevented.

What can happen if food items with harmful additives is taken for a long time?

When food containing fat or oil is not used and left for a long time, their smell and state changes. Name the process which is responsible for this change . List two methods to prevent or slow down the above change.

What do you mean by rancidity? Mention any two ways by which rancidity can be prevented.

Fats are oils containing foods,when kept for long time then what change take place in items?What is name of this process?