1
JEE Main 2021 (Online) 22th July Evening Shift
+4
-1
What will be the average value of energy for a monoatomic gas in thermal equilibrium at temperature T?
A
$${3 \over 2}{k_B}T$$
B
$${k_B}T$$
C
$${2 \over 3}{k_B}T$$
D
$${1 \over 2}{k_B}T$$
2
JEE Main 2021 (Online) 20th July Evening Shift
+4
-1
Which of the following graphs represent the behavior of an ideal gas? Symbols have their usual meaning.
A
B
C
D
3
JEE Main 2021 (Online) 20th July Evening Shift
+4
-1
The correct relation between the degrees of freedom f and the ratio of specific heat $$\gamma$$ is :
A
$$f = {2 \over {\gamma - 1}}$$
B
$$f = {2 \over {\gamma + 1}}$$
C
$$f = {{\gamma + 1} \over 2}$$
D
$$f = {1 \over {\gamma + 1}}$$
4
JEE Main 2021 (Online) 20th July Morning Shift
+4
-1
Consider a mixture of gas molecule of types A, B and C having masses mA < mB < mC. The ratio of their root mean square speeds at normal temperature and pressure is :
A
$${v_A} = {v_B} \ne {v_C}$$
B
$${1 \over {{v_A}}} > {1 \over {{v_B}}} > {1 \over {{v_C}}}$$
C
$${1 \over {{v_A}}} < {1 \over {{v_B}}} < {1 \over {{v_C}}}$$
D
$${v_A} = {v_B} = {v_C} = 0$$
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