1
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
$$\mathrm{m^{\frac{1}{2}}T^{\frac{1}{2}}}$$
2
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

An ideal gas at pressure '$$p$$' is adiabatically compressed so that its density becomes twice that of the initial. If $$\gamma=\frac{c_p}{c_v}=\frac{7}{5}$$, then final pressure of the gas is

A
p
B
2p
C
$$\frac{7}{5}$$p
D
2.63p
3
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following statements is wrong for an isobaric process?

A
The pressure of the system remains constant
B
There is change in volume, when work is done
C
Temperature of the system remains constant
D
Energy exchanged is used to do work to change internal energy
4
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

For a perfectly black body, coefficient of emission is

A
zero
B
infinity
C
unity
D
less than one (non-zero)
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