Water rises to a height of 10cm in a capillary tube and mercury falls to a depth of 3.42 cm in the same capillary tube. If the density of mercury is 13.6 and the angle of contact of mercury and water are 135 ° ° and 0 ° ° respectively, then the ratio of surface tensions of water and mercury is
Text Solution
Verified by ExpertsThe correct answer is:
C
h = 
or S = 
or S ∝ ∝ 
Putting the values,
we obtain 1 : 6.5
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