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.

Step-by-step 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.