A) oil drop tries to become spherical due to the surface tension
B) surface tension of water is greater than the surface tension of oil
C) surface tension of water is equal to the surface of oil
D) weight of oil is less than weight of water
Correct Answer: B
Solution :
A oil drop on the water surface spreads like a thin layer because the force of cohesion between water molecules is greater than the force of adhesion between the molecules of oil and water. Therefore surface tension of water is greater than that of oil.
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