First slide

Surface tension and surface energy

Question

The parts of motor cars are polished by chromium because the angle of contact between water and chromium is

Moderate

A

0^o
B

90^o
C

Less than 90^o
D

Greater than 90^o

Solution

The parts of motor cars are polished by chromium because the angle of contact between water and chromium is greater than $90^{o}$

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