Download App

11. thermodynamics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics11. thermodynamics1 Mark
MCQ
A gas at initial temperature $T$ undergoes sudden expansion from volume $V$ to $2 \,V$. Then,
  • ✓
    the process is adiabatic
  • B
    the process is isothermal
  • C
    the work done in this process is $n R T \ln _{e}(2)$, where $n$ is the number of moles of the gas
  • D
    the entropy in the process does not change
✓

Answer

Correct option: A.
the process is adiabatic
a
$(a)$ In sudden expansion, time duration is small. Thus, heat does not leave or enter the gas mass.

Process of sudden expansion is adiabatic process, $\Delta Q=0$

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 11. thermodynamics→11. thermodynamics — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

For the one$-$dimensional motion, described by $\text{x}=\text{t}-\sin\text{t}.$
→
Electromagnetic force is:
→
What is the maximum acceleration of the particle doing the $SHM$ $y = 2\sin \left[ {\frac{{\pi t}}{2} + \phi } \right]$ where $2$ is in $cm$
→
A $50 \;kg$ girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter $1.0 \;cm$. What is the pressure exerted by the heel on the horizontal floor ?
→
As the temperature is increased, the time period of a pendulum:
→
In a liquid flowing through a pipe, the pressure difference between its ends is made half and the radius is doubled. If the initial rate of flow of liquid was $Q$. What is the new rate of flow of liquid through the pipe?
→
When two sound sources of the same amplitude but of slightly different frequencies $v_1$ and $v_2$ are sounded simultaneously, the sound one hears has a frequency equal to
→
A ball is moving towards the wall as shown in diagram then its momentum is conserved
→
The length of an iron wire is $L$ and area of cross-section is $A$. The increase in length is $l$ on applying the force $F$ on its two ends. Which of the statement is correct
→
$Assertion$ : Graph between potential energy of a spring versus the extension or compression of the spring is a straight line.

$Reason$ : Potential energy of a stretched or compressed spring, proportional to square of extension or compression.

→