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

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 9.2 , surface tension→9.2 , surface tension — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

The root mean square speed of molecules of a given mass of a gas at $27^{\circ} C$ and $1$ atmosphere pressure is $200\, ms ^{-1}$. The root mean square speed of molecules of the gas at $127^{\circ} C$ and $2$ atmosphere pressure is $\frac{ x }{\sqrt{3}}\, ms ^{-1} .$ The value of $x$ will be ......$ms ^{-1} .$

The force of interaction between two atoms is given by $F\, = \,\alpha \beta \,\exp \,\left( { - \frac{{{x^2}}}{{\alpha kt}}} \right);$ where $x$ is the distance, $k$ is the Boltzmann constant and $T$ is temperature and $\alpha $ and $\beta $ are two constants. The dimension of $\beta $ is

A car of weight $W$ is on an inclined road that rises by $100\,m$ over a distance of $1\,Km$ and applies a constant frictional force $\frac {W}{20}$ on the car. While moving uphill on the road at a speed of $10\,ms^{-1},$ the car needs power $P.$ If it needs power $\frac {P}{2}$ while moving down hill at speed $v$ then value of $v$ is ........ $ms^{-1}$

A cube of metal is subjected to a hydrostatic pressure of $4\;GPa.$ The percentage change in the length of the side of the cube is close to.......$\%$
(Given bulk modulus of metal, $B =8 \times 10^{10}\, Pa$ )

The angular speed of the wheel of a vehicle is increased from $360 \;rpm$ to $1200 \;rpm$ in $14 \;second$. Its angular acceleration is,

A string $1\,\,m$ long is drawn by a $300\,\,Hz$ vibrator attached to its end. The string vibrates in $3$ segments. The speed of transverse waves in the string is equal to .... $m/s$

A spring whose unstretched length is $\ell $ has a force constant $k$. The spring is cut into two pieces of unstretched lengths $\ell_1$ and $\ell_2$ where, $\ell_1 = n\ell_2$ and $n$ is an integer. The ratio $k_1/k_2$ of the corresponding force constants, $k_1$ and $k_2$ will be

If the value of moment of inertia of a solid sphere relative to its diameter is I, then the moment of inertia of the sphere relative to its tangent line will be:

The moment of inertia of a body about a given axis is $1.2 \;kg m^{2}$. Initially, the body is at rest. In order to produce a rotational kinetic energy of $1500\; joule$, an angular acceleration of $25 \;rad s^{-2}$ must be applied about that axis for a duration of

A geostationary satellite is revolving around the earth. To make it escape from gravitational field of earth, is velocity must be increased ........ $\%$