|
A drop of oil is placed on the surface of water then it will spread as a thin layer because |
|
|
a) |
surface tension tends to give the oil a spherical surface |
|
b) |
surface tension of water is greater than that of oil |
|
c) |
both oil and water have nearly equal surface tension |
|
d) |
oil is lighter than water |
|
A drop of oil is placed on the surface of water then it will spread as a thin layer because |
|
|
a) |
surface tension tends to give the oil a spherical surface |
|
b) |
surface tension of water is greater than that of oil |
|
c) |
both oil and water have nearly equal surface tension |
|
d) |
oil is lighter than water |
|
(b) An oil drop spreads as thin layer, on the surface of water because the cohesive force between water molecules is greater than the adhesive force between water-oil molecules, hence the surface tension of water is greater than that oil. |