JEE Main 2013 — Mechanical Properties of Fluids Question with Solution
JEE Main 2013 (23 Apr Online)
Question
Wax is coated on the inner wall of a capillary tube and the tube is then dipped in water. Then, compared to the unwaxed capillary, the angle of contact and the height upto which water rises change. These changes are :
Choose an option
Show full solutionCorrect option: C
Correct answer
C increases and decreases
Step-by-step explanation
Angle of
when water is on a waxy or oily surface
is negative i.e.,
i.e., angle of contact increases
And for liquid level in capillary
tube fall. i.e., h decreases
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This is a previous-year question from JEE Main 2013, covering the Mechanical Properties of Fluids chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.