Question

When a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary choose the correct options?

• A. The surface Tension of the liquid must be zero
• B. The contact angle must be 90°
• C. The surface tension may be zero
• D. The contact angle may be 90°

Answer 1

Answer: (C), (D)

The correct options are
C

The surface tension may be zero

D

The contact angle may be 90°

You cannot surely say that surface tension is surely zero or contact angle must be ${90}^{\circ }$
Hence C & D is the correct option