Multiple choice

Which one of the following properties of heat helps in increasing the shelf life of food ?

  1. The objects expands on heating and contracts after cooling.

  2. After being heated, the material of the object can undergo a change in its state.

  3. Heat can accelerate chemical reactions.

  4. Heat can kill the harmful bacteria and germs in any food items.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Heat can kill the harmful bacteria and germs. This property of heat helps in keeping the food items, preserved for a longer time. This is why, food is heated to increase its shelf life.

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