Q80 / 90 · JEE Main 2024 (05 Apr Shift 1) · Physics

Given below are two statements : Statement I : When a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary. The contact angle may be $0^{\circ}$. Statement II : The contact angle between a solid and a liquid is a property of the material of the solid and liquid as well. In the light of the above statement, choose the correct answer from the options given below.

  • A
    Both Statement I and Statement II are false
  • B
    Both Statement I and Statement II are true
  • Correct answer
    C
    Statement I is false but Statement II is true
  • D
    Statement I is true and Statement II is false

Solution

Capillary rise $\mathrm{h}=\frac{2 \mathrm{~T} \cos \theta}{\rho \mathrm{gr}} \text {; }$ If $\theta=0^{\circ}$ then rise is non-zero $\therefore$ Statement-1 is incorrect.

Hence, the correct answer is option: 'C'.

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