Q130 / 180 · AIIMS 2012 · Physics

Assertion : Surface energy of an oil drop is same whether placed on glass or water surface.Reason : Surface energy is dependent only on the properties of oil.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    If assertion is true but reason is false.
  • Correct answer
    D
    If both assertion and reason are false.

Solution

If a material is in contact with another material, the surface energy depends on the interaction of molecules of the materials. If the molecules of the materials attract each other, surface energy is reduced and when they repel each other, the surface energy is increased. Thus the surface energy depends on both the materials, so both the assertion and reason are false.

Hence, the correct answer is option: 'D'.

Relevant Questions