1
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Equal volumes of two gases, having their densíties in the ratio of $$1: 16$$ exert equal pressures on the walls of two containers. The ratio of their rms speads ($$\mathrm{C}_1: \mathrm{C}_2)$$ is

A
$$1: 4$$
B
$$4: 1$$
C
$$8: 1$$
D
$$1: 8$$
2
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A cylindrical rod has temperatures '$$T_1$$' and '$$T_2$$' at its ends. The rate of flow of heat is '$$Q_1$$' cal $$\mathrm{s}^{-1}$$. If length and radius of the rod are doubled keeping temperature constant, then the rate of flow of heat '$$\mathrm{Q}_2$$' will be

A
$$\mathrm{Q}_2=\frac{\mathrm{Q}_1}{2}$$
B
$$\mathrm{Q}_2=\frac{\mathrm{Q}_1}{4}$$
C
$$\mathrm{Q_2=4 Q_1}$$
D
$$\mathrm{Q}_2=2 \mathrm{Q}_1$$
3
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The initial pressure and volume of a gas is '$$\mathrm{P}$$' and '$$\mathrm{V}$$' respectively. First by isothermal process gas is expanded to volume '$$9 \mathrm{~V}$$' and then by adiabatic process its volume is compressed to '$$\mathrm{V}$$' then its final pressure is (Ratio of specific heat at constant pressure to constant volume $$=\frac{3}{2}$$)

A
6 P
B
27 P
C
3 P
D
9 P
4
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $$\mathrm{m}$$' represents the mass of each molecules of a gas and $$\mathrm{T}$$' its absolute temperature then the root mean square speed of the gas molecule is proportional to

A
$$\mathrm{m^{-\frac{1}{2}}T^{\frac{1}{2}}}$$
B
mT
C
$$\mathrm{m^{\frac{1}{2}}T^{-\frac{1}{2}}}$$
D
$$\mathrm{m^{\frac{1}{2}}T^{\frac{1}{2}}}$$
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