1
JEE Main 2024 (Online) 4th April Evening Shift
MCQ (Single Correct Answer)
+4
-1

A sample of gas at temperature $$T$$ is adiabatically expanded to double its volume. Adiabatic constant for the gas is $$\gamma=3 / 2$$. The work done by the gas in the process is:

$$(\mu=1 \text { mole })$$

A
$$R T[2 \sqrt{2}-1]$$
B
$$R T[2-\sqrt{2}]$$
C
$$R T[1-2 \sqrt{2}]$$
D
$$R T[\sqrt{2}-2]$$
2
JEE Main 2024 (Online) 4th April Evening Shift
MCQ (Single Correct Answer)
+4
-1

The translational degrees of freedom $$\left(f_t\right)$$ and rotational degrees of freedom $$\left(f_r\right)$$ of $$\mathrm{CH}_4$$ molecule are:

A
$$f_t=2$$ and $$f_r=2$$
B
$$f_t=3$$ and $$f_r=3$$
C
$$f_t=3$$ and 4$f_r=2$$
D
$$f_t=2$$ and $$f_r=3$$
3
JEE Main 2024 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

P-T diagram of an ideal gas having three different densities $$\rho_1, \rho_2, \rho_3$$ (in three different cases) is shown in the figure. Which of the following is correct :

JEE Main 2024 (Online) 4th April Morning Shift Physics - Heat and Thermodynamics Question 16 English

A
$$\rho_1>\rho_2$$
B
$$\rho_2<\rho_3$$
C
$$\rho_1=\rho_2=\rho_3$$
D
$$\rho_1<\rho_2$$
4
JEE Main 2024 (Online) 4th April Morning Shift
MCQ (Single Correct Answer)
+4
-1

The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are $$8 \Omega$$ and $$10 \Omega$$ respectively. After inserting in a hot bath of temperature $$400^{\circ} \mathrm{C}$$, the resistance of platinum wire is :

A
10 $$\Omega$$
B
16 $$\Omega$$
C
8 $$\Omega$$
D
2 $$\Omega$$
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