Download App

12 . kinetic theory of gases — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics12 . kinetic theory of gases1 Mark
MCQ
The temperature of a gas is $ -68^\circ C$. At ...... $^oC$ temperature will the average kinetic energy of its molecules be twice that of at $ -68^\circ C$
  • ✓
    $ 137$
  • B
    $ 127$
  • C
    $ 100$
  • D
    $ 105$
✓

Answer

Correct option: A.
$ 137$
a
$\frac{{{E_2}}}{{{E_1}}} = \frac{{{T_2}}}{{{T_1}}}$

$\Rightarrow 2 = \frac{{{T_2}}}{{{T_1}}} $

$\Rightarrow {T_2} = 2{T_1}$ 

$ \Rightarrow {T_2} = 2(273 - 68) = 410K = 137^\circ C$

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 12 . kinetic theory of gases→12 . kinetic theory of gases — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A particle on the trough of a wave at any instant will come to the mean position after a time ($T =$ time period)
→
A box contains n molecules of a gas. How will the pressure of the gas be effected, if the number of molecules is made $2n$
→
If $V$ is the gravitational potential due to sphere of uniform density on it's surface, then it's value at the center of sphere will be:-
→
A ball is dropped from a height of $49\,m$. The wind is blowing horizontally. Due to wind a constant horizontal acceleration is provided to the ball. Choose the correct statement (s). (Take $g=9.8\,m / s ^2$ )
→
The gradient of velocity $v/s$ time graph is equal to $...........$
→
$\overrightarrow A $ and $\overrightarrow B $ are two vectors given by $\overrightarrow A  = 2\widehat i + 3\widehat j$ and $\overrightarrow B  = \widehat i + \widehat j$. The magnitude of  the component (projection) of $\overrightarrow A$ on $\overrightarrow  B$ is
→
A light pointer fixed to one prong of a tuning fork touches a vertical plate. The fork is set vibrating and the plate is allowed to fall freely. If eight oscillations are counted when the plate falls through $10 cm$, the frequency of the tuning fork is .... $Hz$
→
A particle is moving with speed $6\,m/s$ along the direction of  $\vec A = 2\hat i + 2\hat j - \hat k,$ then its velocity is
→
A scientist says that the efficiency of his heat engine which operates at source temperature $127°C$ and sink temperature $27°C$ is $26\%$, then
→
With rise in temperature, density of a given body changes according to one of the following relations
→