1
MHT CET 2021 20th September Evening Shift
+1
-0

A perfect gas of volume 10 litre n compressed isothermally to a volume of 1 litre. The rms speed of the molecules will

A
decrease 5 times
B
remain unchanged
C
increase 5 times
D
increase 10 times
2
MHT CET 2021 20th September Evening Shift
+1
-0

The relation obeyed by a perfect gas during an adiabatic process is $$\mathrm{PV}^{3 / 2}$$. The initial temperature of the gas is '$$\mathrm{T}$$'. When the gas is compressed to half of its Initial volume, the final temperature of the gas is

A
$$2 \sqrt{2} \mathrm{~T}$$
B
$$4 \mathrm{~T}$$
C
$$\sqrt{2} \mathrm{~T}$$
D
$$2 \mathrm{~T}$$
3
MHT CET 2021 20th September Evening Shift
+1
-0

A black rectangular surface of area '$$\mathrm{A}$$' emits energy '$$\mathrm{E}$$' per second at $$27^{\circ} \mathrm{C}$$. If length and breadth is reduced to $$(1 / 3)^{\text {rd }}$$ of its initial value and temperature is raised to $$327^{\circ} \mathrm{C}$$ then energy emitted per second becomes

A
$$\frac{20 \mathrm{E}}{9}$$
B
$$\frac{8 \mathrm{E}}{9}$$
C
$$\frac{16 \mathrm{E}}{9}$$
D
$$\frac{4 \mathrm{E}}{9}$$
4
MHT CET 2021 20th September Evening Shift
+1
-0

A monoatomic gas is suddenly compressed to (1/8)th of its initial volume adiabatically. The ratio of the final pressure to initial pressure of the gas is ($$\gamma=5/3$$)

A
32
B
8
C
$$\frac{40}{3}$$
D
$$\frac{24}{5}$$
EXAM MAP
Medical
NEET