Surface Tension JEE Main PYQs PDF, 2020–2026

Surface Tension questions per year

Topic-wise weightage by year

How many Surface Tension questions each topic had in every JEE Main year (all shifts), counting every question asked, including ones not in the PDF. Darker cells mean more questions.

Swipe the table sideways for older years.

Newest questions (2026)

All 7 JEE Main 2026 Surface Tension questions in the free PDF, latest shift first.

1. JEE Main 2026 · 5 Apr · Shift 2 · Surface Energy and Surface Tension

   Eight mercury drops, each of radius $r$, coalesce to form a bigger drop. The surface energy released in this process is $\_\_\_\_$ - ( $S$ is the surface tension of mercury).

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2. JEE Main 2026 · 4 Apr · Shift 1 · Surface Energy and Surface Tension

   The surface tension of a soap solution is $3.5\times {10}^{{-2}}{\ \mathrm{N}}/{\mathrm{m}}$. The work required to increase the radius of a soap bubble from 1 cm to 2 cm is $\alpha\times {10}^{{-6}}{\ \mathrm{J}}$. The value of $\alpha$ is $\_\_\_\_$ .

   $(\pi=22/7)$

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3. JEE Main 2026 · 2 Apr · Shift 2 · Surface Energy and Surface Tension

   The surface tension of a soap bubble is 0.03 N/m. The work done in increasing the diameter of bubble from 2 cm to 6 cm is $\alpha\pi\times {10}^{{-4}}$ J. The value of $\alpha$ is _________. (Take $\pi=3.14$)

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4. JEE Main 2026 · 2 Apr · Shift 1 · Surface Energy and Surface Tension

   A liquid drop of diameter 2 mm breaks into 512 droplets. The change in surface energy is $\alpha\times {10}^{{-6}}$ J. The value of $\alpha$ is _______. (Take surface tension of liquid = 0.08 N/m)

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5. JEE Main 2026 · 24 Jan · Shift 2 · Surface Energy and Surface Tension

   A soap bubble of surface tension $0.04{\ \mathrm{N}}/{\mathrm{m}}$ is blown to a diameter of 7 cm . If $(15000-x)\mu{\mathrm{J}}$ of work is done in blowing it further to make its diameter 14 cm , then the value of $x$ is $\_\_\_\_$ .

   $(\pi=22/7)$

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6. JEE Main 2026 · 22 Jan · Shift 2 · Capillarity

   When a part of a straight capillary tube is placed vertically in a liquid, the liquid raises upto certain height $h$. If the inner radius of the capillary tube, density of the liquid and surface tension of the liquid decrease by $1\%$ each, then the height of the liquid in the tube will change by $\_\_\_\_$ $\%$.

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7. JEE Main 2026 · 21 Jan · Shift 2 · Capillarity

   Surface tension of two liquids (having same densities), $T_{1}$ and $T_{2}$, are measured using capillary rise method utilizing two tubes with inner radii of $r_{1}$ and $r_{2}$ where $r_{1}>r_{2}$. The measured liquid heights in these tubes are $h_{1}$ and $h_{2}$ respectively. [Ignore the weight of the liquid above the lowest point of miniscus]. The heights $h_{1}$ and $h_{2}$ and surface tensions $T_{1}$ and $T_{2}$ satisfy the relation :

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