Given below are two statements : Statement-I: When a capillary tu… - Vidyadip

MCQ

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 above statement, choose the correct answer from the options given below.

✓
Statement-$I$ is false but Statement-$II$ is true.
B
Both Statement-$I$ and Statement-$II$ are true.
C
Both Statement-$I$ and Statement-$II$ are false.
D
Statement-$I$ is true and Statement-$II$ is false.

✓

Answer

Correct option: A.

Statement-$I$ is false but Statement-$II$ is true.

a
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.

Option$(1)$ is correct

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