1
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A polyatomic gas $$(\gamma=4 / 3)$$ is compressed to $$\left(\frac{1}{8}\right)^{\text {th }}$$ of its volume adiabatically. If its initial pressure is $$\mathrm{P}_0$$, its new pressure will be

A
$$2 \mathrm{P}_0$$
B
$$8 \mathrm{P}_0$$
C
$$6 \mathrm{P}_0$$
D
$$16 \mathrm{P}_0$$
2
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the temperature of the sun is doubled, the rate of energy received by the earth will be increased by a factor

A
8
B
2
C
4
D
16
3
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements is true?

($$\Delta \mathrm{U}=$$ increase in internal energy, $$\mathrm{dW}=$$ work done by the system)

A
In an adiabatic process $$\Delta \mathrm{U}=\mathrm{dW}$$
B
In an adiabatic process $$\Delta \mathrm{U}=-\mathrm{dW}$$
C
In an isothermal process $$\Delta \mathrm{U}=-\mathrm{dW}$$.
D
In an isothermal process $$\Delta \mathrm{U}=\mathrm{dW}$$
4
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Let '$$\mathrm{W}_1$$' be the work done in blowing a soap bubble of radius '$$r$$' from soap solution at room temperature. The soap solution is now heated and second soap bubble of radius '$$2 r$$' is blown from the heated soap solution. If '$$W_2$$' is the work done in forming this bubble then

A
$$\mathrm{W}_2=2 \mathrm{~W}_1$$
B
$$\mathrm{W}_2=4 \mathrm{~W}_1$$
C
$$\mathrm{W}_2>4 \mathrm{~W}_1$$
D
$$\mathrm{W}_2<4 \mathrm{~W}_1$$
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