1. Tardigrade
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  4. 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?

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Q. 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?

Mechanical Properties of Fluids

Solution:

Surface tension of soap solution is less than that of water
As h=2Scosθrρg or h∝S
Therefore, the height of liquid raised in the capillary tube is less for soap solution and more for pure water. Hence option is correct