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Question

Your mother daily cooks food for you from raw grains and raw vegetables. Which type of change is this?



Your Answer
A

physical change

Correct Answer
B

chemical change

Your Answer
C

reversible change

Your Answer
D

temporary change


Solution

The correct option is D

chemical change


The cooking requires heat energy which is supplied by kerosene stove, cooking gas or an electric heater. The composition of raw substances changes due to heat used for cooking and a new substance is formed. So, this is a chemical change. The cooked materials retain their new forms after the cause of change (heating) is removed. This shows that the change is permanent and irreversible.

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