1
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
A carnot engine having an efficiency of $${1 \over {10}}$$ as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is
A
90 J
B
99 J
C
100 J
D
1 J
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
A gas mixture consists of 2 moles of O2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is
A
15 RT
B
9 RT
C
11 RT
D
4 RT
3
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
A given sample of an ideal gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule of the gas is m. Which of the following gives the density of the gas ?
A
P/(kT)
B
Pm/(kT)
C
P/(KTV)
D
mkT
4
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
One mole of an ideal monatomic gas undergoes a process described by the equation PV3 = constant. The heat capacity of the gas during this process is
A
$${3 \over 2}$$ R
B
$${5 \over 2}$$ R
C
2R
D
R

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