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

For which of the two pairs,the angle of contact is the same?

Due to capillary action,a liquid will rise in a tube,if the angle of contact is

Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A)$: Clothes containing oil or grease stains cannot be cleaned by water wash.
Reason $(R)$: Because the angle of contact between the oil/grease and water is obtuse.
In the light of the above statements,choose the correct answer from the options given below.

If a water drop is kept between two glass plates,then its shape is

How does the angle of contact depend on temperature?