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A capillary tube (A) is dipped in water....

A capillary tube (A) is dipped in water. Another identical tube (B) is dipped in a soap-water solution. Which of the following shows the relative nature of the liquid columns in the two tubes?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
D
For surface tension `T = (rhrhog)/(2 cos theta)`
` :. h = (2T cos theta)/(rrhog)` . For both water and soap solution .
` theta = 0 and cos theta =1` and both have a concave meniscus .
` :. h prop T` When soap is disolved in water , the S.t of soap solution is decreased .
` :. ` h for soap soloution `lt` h for water .
Thus Fig (d ) is the correct choice
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