1
WB JEE 2008
+1
-0.25

When the room temperature becomes equal to the dew point, the relative humidity of the room is

A
100%
B
zero%
C
70%
D
85%
2
WB JEE 2024
+1
-0.25

The speed distribution for a sample of $$\mathrm{N}$$ gas particles is shown below. $$\mathrm{P}(\mathrm{v})=0$$ for $$\mathrm{v}>2 \mathrm{v}_0$$. How many particles have speeds between $$1.2 \mathrm{v}_0$$ and $$1.8 \mathrm{v}_0$$ ?

A
0.2 N
B
0.4 N
C
0.6 N
D
0.8 N
3
WB JEE 2024
+1
-0.25

The internal energy of a thermodynamic system is given by $$U=a s^{4 / 3} V^\alpha$$ where $$\mathrm{s}$$ is entropy, $$\mathrm{V}$$ is volume and '$$\mathrm{a}$$' and '$$\alpha$$' are constants. The value of $$\alpha$$ is

A
1
B
$$-$$1
C
$$\frac{1}{3}$$
D
$$-\frac{1}{3}$$
4
WB JEE 2023
+1
-0.25

Six molecules of an ideal gas have velocities 1, 3, 5, 5, 6 and 5 m/s respectively. At any given temperature, if $$\mathrm{\overline V}$$ and $$\mathrm{V_{rms}}$$ represent average and rms speed of the molecules, then

A
$$\mathrm{\overline V = 5}$$ m/s
B
$$\mathrm{{V_{rms}} > \overline V}$$
C
$$\mathrm{V_{rms}^2 < {\overline V ^2}}$$
D
$$\mathrm{{V_{rms}} = \overline V}$$
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