Question
Question: A capillary tube (I) is dipped in water. Another identical tube (II) is dipped in a soap-water solut...
A capillary tube (I) is dipped in water. Another identical tube (II) is dipped in a soap-water solution. Which of the following shows the relative nature of the liquid columns in the two tubes?
A
(a) 
A
(b) 
A
(c) 
A
(d) 
Explanation
Solution
(c) Surface tension of soap solution is less than that of water.
As 
Or 
Therefore the height of liquid raised in the capillary tube is less for soap solution and more for pure water hence option (c) is correct.