Surface Tension JEE Main PYQs, 2020 to 2025

JEE Main 2025 · 4 Apr · Shift 1 · Angle of Contact

1. (A) K is negative, then liquid A and liquid B have convex meniscus.
2. (B) $K$ is negative, then liquid $A$ and liquid $B$ have concave meniscus.
3. (C)K is zero, then liquid A has convex meniscus and liquid B has concave meniscus.
4. (D)K is negative, then liquid A has concave meniscus and liquid B has convex meniscus.

Answer: (D)

JEE Main 2025 · 3 Apr · Shift 2 · Excess Pressure in Drops and Bubbles

Answer: 8

JEE Main 2025 · 2 Apr · Shift 2 · Surface Energy and Surface Tension

1. (A)$4 \pi \mathrm{r}^2 \mathrm{~T}\left[2-2^{1 / 3}\right]$
2. (B)$4 \pi \mathrm{r}^2 \mathrm{~T}[1+\sqrt{2}]$
3. (C)$4 \pi \mathrm{r}^2 \mathrm{~T}\left[2-2^{2 / 3}\right]$
4. (D) $4 \pi \mathrm{r}^2 \mathrm{~T}[\sqrt{2}-1]$

Answer: (C)

JEE Main 2024 · 5 Apr · Shift 1 · Capillarity

1. (A)Statement I is true and Statement II is false
2. (B)Statement I is false but Statement II is true
3. (C)Both Statement I and Statement II are true
4. (D)Both Statement I and Statement II are false

Answer: (B)