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Capillary Rise and Angle of Contact for JEE: 16 solved questions

Real JEE paper questions on capillary rise and angle of contact, part of mechanical properties of fluids. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2005 to 2026. No sign-in needed to read them.

What this topic asks

• Capillary rise — 11 questions
• Drops in equilibrium — 3 questions
• Angle of contact and wetting — 2 questions

All 16 questions with solutions

• Two liquids A and B have θ_A and θ_B as contact angles in a capillary tube. If K=(cos θ_A)/(cos θ_B), then id… JEE Main 4th April 1st Shift 2025
• Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). As… JEE Main 29th July 1st Shift 2022
• Surface tensions of two liquids having the same density, T₁ and T₂, are measured using the capillary rise met… JEE Main 21st Jan 2nd Shift 2026
• When a part of a straight capillary tube is placed vertically in a liquid, the liquid rises upto a certain he… JEE Main 22nd Jan 2nd Shift 2026
• A capillary tube of radius 0.1 mm is partly dipped in water (surface tension 70 dyn cm⁻¹ and glass-water cont… JEE Main 7th April 2nd Shift 2025
• The height of the liquid column raised in a capillary tube of certain radius when dipped vertically in liquid… JEE Main 30th Jan 1st Shift 2023
• Two narrow bores of diameter 5.0 mm and 8.0 mm are joined together to form a U-shaped tube open at both ends.… JEE Main 26th Aug 1st Shift 2021
• A capillary tube made of glass, of radius 0.15 mm, is dipped vertically in a beaker filled with methylene iod… JEE Main 2nd Sept 2nd Shift 2020
• If M is the mass of water that rises in a capillary tube of radius r, then the mass of water which will rise… JEE Main 9th April 1st Shift 2019
• The ratio of surface tensions of mercury and water is given to be 7.5, while the ratio of their densities is… JEE Main 10th April 1st Shift 2019
• A capillary tube A is dipped in water. Another identical tube B is dipped in a soap-water solution. Each choi… AIEEE 2008
• A 20 cm long capillary tube is dipped in water. The water rises up to 8 cm. If the entire arrangement is put… AIEEE 2005
• When a long glass capillary tube of radius 0.015 cm is dipped in a liquid, the liquid rises to a height of 15… JEE Main 3rd Sept 1st Shift 2020
• A drop of liquid of density ρ is floating half immersed in a liquid of density σ and surface tension 7.5×10⁻⁴… JEE Main 25th July 2nd Shift 2022
• A small spherical droplet of density d is floating exactly half immersed in a liquid of density ρ and surface… JEE Main 9th Jan 2nd Shift 2020
• On heating water, bubbles formed at the bottom of the vessel detach and rise. Take the bubbles to be spheres… JEE Main 2014