1
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

AIPMT 2012 Prelims Physics - Heat and Thermodynamics Question 23 English
A
2PV
B
4PV
C
$${1 \over 2}$$ PV
D
PV
2
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
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
During an isothermal expansion, a confined ideal gas does $$-$$ 150 J of work against its surroundings. This implies that
A
150 J of heat has been removed from the gas
B
300 J of heat has been added to the gas
C
no heat is transferred because the process is isothermal
D
150 J of heat has been added to the gas
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
When 1 kg of ice at 0oC melts to water at 0oC, the resulting change in its entropy, taking latent heat of ice to be 80 cal/oC, is
A
273 cal/K
B
8 $$ \times $$ 104 cal/K
C
80 cal/K
D
293 cal/K
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