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A change in the physical state can be brought about

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Question

A change in the physical state can be brought about

Options

  • only when energy is given to the system

  • only when energy is taken out from the system

  • when energy is either given to or taken out from the system

  • without any energy change

MCQ
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Solution

when energy is either given to or taken out from the system

When energy is given to the system the solid state changes to liquid. When energy is taken out from a liquid it changes to solid e.g., ice changes to water and water to water vapours when heat energy is given. Water vapours or steam condense to water and water freezes to ice when energy is decreased.

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Chapter 3: Atoms and Molecules - Multiple Choice Questions [Page 20]

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NCERT Exemplar Science Exemplar [English] Class 9
Chapter 3 Atoms and Molecules
Multiple Choice Questions | Q 10. | Page 20

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