Surface Tension is an important topic in the Physics section in MHT CET exam. Practising this topic will increase your score overall and make your conceptual grip on MHT CET exam stronger.
This article gives you a full set of MHT CET PYQs for Surface Tension with explanations for effective preparation. Practice of MHT CET Physics PYQs including Surface Tension questions regularly will improve accuracy, speed, and confidence in the MHT CET 2026 exam.
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MHT CET PYQs for Surface Tension with Solutions
1.
On the surface of the liquid in equilibrium, molecules of the liquid possess- maximum potential energy
- minimum potential energy
- maximum kinetic energy
- minimum kinetic energy
2.
A metal wire of density ‘ρ’ floats on water surface horizontally. If it is NOT to sink in water, then maximum radius of wire is (T = surface tension of water, g = gravitational acceleration)
\(\sqrt {\frac {πρg}{T}}\)
\(\frac {T}{πρg}\)
\(\frac {πρg}{T}\)
\(\sqrt{\frac {T}{πρg}}\)
3.
With an increase in temperature, surface tension of liquid (except molten copper and cadmium)- increases
- remain same
- decreases
- first decreases then increases
4.
A big drop is formed by coalescing 1000 small droplets of water. The surface energy will become:- \( \frac{1}{100} \)th
- \( \frac{1}{10} \)th
- \( 100 \) times
- \( 10 \) times
5.
A spherical air bubble is formed inside a liquid (like water). The radius of the bubble is 0.5 mm, and the surface tension of the liquid is 0.072 N/m. What is the pressure inside the bubble relative to the outside pressure?- \(1.44 \times 10^3 \, \text{Pa}\) more
- \(1.44 \times 10^2 \, \text{Pa}\) more
- \(2.88 \times 10^3 \, \text{Pa}\) more
- \(2.88 \times 10^2 \, \text{Pa}\) more
6.
A molecule of water on the surface experiences a net- downward resultant unbalanced adhesive force
- upward resultant unbalanced cohesive force
- downward resultant unbalanced cohesive force
- upward resultant unbalanced adhesive force
7.
When two soap bubbles of radii \( a \) and \( b \) (\( b>a \)) coalesce, the radius of curvature of the common surface is:- \( \frac{ab}{b - a} \)
- \( \frac{ab}{a + b} \)
- \( \frac{b - a}{ab} \)
- \( \frac{a + b}{ab} \)
8.
Two small drops of mercury, each of radius $R$, coalesce to form a single large drop. The ratio of the total surface energies before and after the change is- $1 : 2^{1/3}$
- $2^{1/3}: 1$
- $2 : 1$
- $1 : 2$
9.
What is the energy required to increase the radius of a soap bubble from \( R \) to \( 2R \) considering the surface tension \( T \)?- \( 8 \pi T R^2 \)
- \( 4 \pi T R^2 \)
- \( 2 \pi T R^2 \)
- \( 16 \pi T R^2 \)
10.
Two drops of equal radius coalesce to form a bigger drop. What is ratio of surface energy of bigger drop to smaller one ?- $ 2^{1/2} : 1 $
- $ 1 :1 $
- $ 2^{2/3} : 1 $
- None of these
11.
If \( M \) is the mass of water that rises in a capillary tube of radius \( r \), then the mass of water which will rise in a capillary tube of radius \( 2r \) is:- \( M \)
- \( \frac{M}{2} \)
- \( 4M \)
- \( 2M \)
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