First slide

Surface tension and surface energy

Question

A water drop takes the shape of a sphere in a oil while the oil drop spreads in water, because

Moderate

A

C.F. for water > A.F. for water and oil
B

C.F. for oil > A.F. for water and oil
C

C.F. for oil < A.F. for water and oil
D

None of the above

Solution

A water drop takes the shape of a sphere in a oil while the oil drop spreads in water, because C.F. for water > A.F. for water and oil.

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