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Q: Which of the following is not an example of chemical change?
  • A. Digestion of food in the body
  • B. Making curd form milk
  • C. Change of water into water vapor
  • D. Rusting of iron
Correct Answer: Option C - The change in which the material cannot be easily recovered in its former state after the change, is called chemical change. A new substance is formed in it. It involves both physical and chemical changes. Such as making curd from milk, digestion of food in the body and rusting of iron, etc. are examples of chemical changes while the change of water in water vapor is called evaporation and it comes under physical change.
C. The change in which the material cannot be easily recovered in its former state after the change, is called chemical change. A new substance is formed in it. It involves both physical and chemical changes. Such as making curd from milk, digestion of food in the body and rusting of iron, etc. are examples of chemical changes while the change of water in water vapor is called evaporation and it comes under physical change.

Explanations:

The change in which the material cannot be easily recovered in its former state after the change, is called chemical change. A new substance is formed in it. It involves both physical and chemical changes. Such as making curd from milk, digestion of food in the body and rusting of iron, etc. are examples of chemical changes while the change of water in water vapor is called evaporation and it comes under physical change.