A) diameter of the capillary may be different in the two cases
B) temperature of liquid is higher than that of water
C) surface tension of water is less than that of the liquid
D) both [a] and [c]
Correct Answer: C
Solution :
The height to which liquid rises in a capillary is given by, \[h=\frac{2T}{r\rho g}\]. Thus, if height to which liquid rises is more, the liquid have greater surface tension than water. Option [a] is not suitable because diameter of capillary tube containing? liquid should be smaller than the capillary in which water rises. This is not mentioned clearly in the option .
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