WB JEE 2019 | Heat and Thermodynamics Question 29 | Physics

WB JEE 2019

MCQ (More than One Correct Answer)

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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?

$$({2^{\gamma - 1}} - 1){{{p_0}V} \over {\gamma - 1}}$$

$$\gamma {p_0}{V_0}In2$$

$${{{p_0}V} \over {2(\gamma - 1)}}$$

WB JEE 2018

MCQ (More than One Correct Answer)

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Which of the following statement(s) is/are true?

"Internal energy of an ideal gas .............."

decreases in an isothermal process.

remains constant in an isothermal process.

increases in an isobaric process.

decreases in an isobaric expansion.

WB JEE 2017

MCQ (More than One Correct Answer)

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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

proportional to $$\sqrt \rho $$, when T is constant

proportional to $$\sqrt T $$

proportional to $$\sqrt p $$, when $$\rho $$ is constant

proportional to T.

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