A) If cohesive force = adhesive force, then angle of contact, \[\theta =90{}^\circ \]
B) If cohesive force < adhesive force, then angle of contact, \[\theta <90{}^\circ \]
C) If cohesive force > adhesive force, then angle of contact, \[\theta >90{}^\circ \]
D) If the radius of capillary is reduced to half, then the rise of liquid column becomes four times
Correct Answer: D
Solution :
As the rise of liquid column, \[h\propto \frac{1}{r}\] Then, by reducing the radius of capillary to half, the rise of liquid will be two times.
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