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Question

Change of water into steam is a:


  1. physical and chemical change

  2. biological change

  3. physical change
  4. chemical change


Solution

The correct option is C physical change

Physical changes are those changes which affect the form of a chemical substance, but not its chemical composition. Whereas chemical change is any change that results in the formation of a new substance. It involves making or breaking of bonds between atoms. When water is changed into steam, there is no change in the composition of the matter, only the physical state of water changes from liquid to gaseous. Hence, this is a physical change.

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