1
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
An ideal gas goes from state A to state B via three different processes as indicated in the P-V diagram.

If Q1, Q2, Q3 indicate the heat absorbed by the gas along the three processes and $$\Delta$$U1, $$\Delta$$U2, $$\Delta$$U3 indicate the change in internal energy along the three processes respectively, then
A
Q1 > Q2 > Q3 and $$\Delta$$U1 = $$\Delta$$U2 = $$\Delta$$U3
B
Q3 > Q2 > Q1 and $$\Delta$$U1 = $$\Delta$$U2 = $$\Delta$$U3
C
Q1 = Q2 = Q3 and $$\Delta$$U1 > $$\Delta$$U2 > $$\Delta$$U3
D
Q3 = Q2 = Q1 and $$\Delta$$U1 > $$\Delta$$U2 > $$\Delta$$U3
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
One mole of an ideal gas goes from an initial state A to final state B via two processes : It first undergoes isothermal expansion from volume V to 3V and then its volume is reduced from 3V to V at constant pressure. The correct P-V diagram representing the two process is
A
B
C
D
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
A thermodynamic system is taken through the cycle ABCD as shown in figure. Heat rejected by the gas during the cycle is

A
2PV
B
4PV
C
$${1 \over 2}$$ PV
D
PV
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
A mass of diatomic gas $$(\gamma = 1.4)$$ at a pressure of 2 atmospheres is compressed adiabatically so that its temperature rises from 27oC to 927oC. The pressure of the gas in the final state is
A
8 atm
B
28 atm
C
68.7 atm
D
256 atm
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