Question

13. Water rises to a height of 10 cm in a capillary tube and
mercury falls to a depth of 3.5 cm in the same capillary
tube. If the density of mercury is 13.6 g/cc and its
angle of contact is 135º and density of water is 1 g/cc
and its angle of contact is 0°, then the ratio of surface
tensions of the two liquids is (cos 135º = 0.7)
(a) 1:14
(b) 5:34
(c) 1:5
(d) 5:25​

Answer 1

Answer:

ans is B

Explanation:

s =h×density÷cos