Question

cooking of rice is a physical change...............? is true or false​

Answer 1

Answer:

cooking of rice is a physical change.

true.

Answer 2

Answer:

This statement is false, cooking of rice is not a physical change.

Explanation:

• Cooking of rice is best described as a chemical change .
• It justifies the characteristics of a chemical change, it is a permanent and irreversible change.
• During the cook in the pressure cooker, pressure is applied on the rice grains which change their texture and taste. So, pressure can be considered as one of the factor for this chemical change.
• Evolution of heat is also one of the criteria of chemical change and it sets true for this phenomenon.
• A new substance is formed after the cook with a complete different odour, texture and taste.
• A handful of rice go through a significant change in volume and occupies a much greater volume than earlier.

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