1
WB JEE 2019
MCQ (More than One Correct Answer)
+2
-0
Change Language
The initial pressure and volume of a given mass of an ideal gas with $$\left( {{{{C_p}} \over {{C_V}}} = \gamma } \right)$$, taken in a cylinder fitted with a piston, are p0 and V0 respectively. At this stage the gas has the same temperature as that of the surrounding medium which is T0. It is adiabatically compressed to a volume equal to $${{{V_0}} \over 2}$$. Subsequently the gas is allowed to come to thermal equilibrium with the surroundings. What is the heat released to the surrounding?
A
0
B
$$({2^{\gamma - 1}} - 1){{{p_0}V} \over {\gamma - 1}}$$
C
$$\gamma {p_0}{V_0}In2$$
D
$${{{p_0}V} \over {2(\gamma - 1)}}$$
2
WB JEE 2018
MCQ (More than One Correct Answer)
+2
-0
Change Language
Which of the following statement(s) is/are true?

"Internal energy of an ideal gas .............."
A
decreases in an isothermal process.
B
remains constant in an isothermal process.
C
increases in an isobaric process.
D
decreases in an isobaric expansion.
3
WB JEE 2017
MCQ (More than One Correct Answer)
+2
-0
Change Language
If the pressure, temperature and density of an ideal gas are denoted by p, T and $$\rho $$, respectively, the velocity of sound in the gas is
A
proportional to $$\sqrt \rho $$, when T is constant
B
proportional to $$\sqrt T $$
C
proportional to $$\sqrt p $$, when $$\rho $$ is constant
D
proportional to T.
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