JEE Main 2021 (Online) 18th March Evening Shift | Heat and Thermodynamics Question 196 | Physics

An ideal gas in a cylinder is separated by a piston in such a way that the entropy of one part is S₁ and that of the other part is S₂. Given that S₁ > S₂. If the piston is removed then the total entropy of the system will be :

S₁ $$-$$ S₂

$${{{S_1}} \over {{S_2}}}$$

S₁ $$\times$$ S₂

S₁ + S₂

JEE Main 2021 (Online) 18th March Morning Shift

MCQ (Single Correct Answer)

-1

The P-V diagram of a diatomic ideal gas system going under cyclic process as shown in figure. The work done during an adiabatic process CD is (use $$\gamma$$ = 1.4) :

JEE Main 2021 (Online) 18th March Morning Shift Physics - Heat and Thermodynamics Question 197 English

JEE Main 2021 (Online) 18th March Morning Shift Physics - Heat and Thermodynamics Question 197 English

$$-$$500 J

$$-$$400 J

400 J

200 J

JEE Main 2021 (Online) 18th March Morning Shift

MCQ (Single Correct Answer)

-1

What will be the average value of energy along one degree of freedom for an ideal gas in thermal equilibrium at a temperature T? (k_B is Boltzmann constant)

$${1 \over 2}{k_B}T$$

$${2 \over 3}{k_B}T$$

$${3 \over 2}{k_B}T$$

$${k_B}T$$

JEE Main 2021 (Online) 17th March Evening Shift

MCQ (Single Correct Answer)

-1

If one mole of the polyatomic gas is having two vibrational modes and $$\beta$$ is the ratio of molar specific heats for polyatomic gas $$\left( {\beta = {{{C_P}} \over {{C_V}}}} \right)$$ then the value of $$\beta$$ is :

1.02

1.35

1.2

1.25

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