# PHYSICS FOR AIEEE, IIT JEE,AIPMT THERMODYNAMICS --I Online Test

One mole of an ideal gas at  is expanded isothermally from an initial volume of 1 litre to 10 liters. The change in energy for this process is  ____.
163.7 cal
850.2 cal
1381.1 cal
Zero
If 0.75 mole of an ideal gas expands isothermally at  from 15 liters to 25 liters, the maximum work obtained is ____.
8.40 J
9.34 J
10.86 J
10.43 J
An engine operating between  and  takes 500 J heat from a higher temperature reservoir if there are no frictional losses, and then work done by engine is ____.
147.7 J
157.75 J
165.85 J
169.95 J
The volume of a gas decreases from  to  when a sample of gas is compressed by an average pressure of 0.6 atm. During this process 10 J of heat is liberated. The change in internal energy is ____.
– 2.16 J
12.156 J
2.16 J
101.3 J
An irreversible process occurring isothermally in an isolated system leads to ____.
Zero entropy
An increase in the total entropy of the system
A decrease in the total entropy of the system
None of the above
A process in which a fluid at a constant high pressure seeps through a porous wall into a region of constant lower pressure without transfer of heat is called
Isobaric process
Throttling process
Isochoric process
For a cyclic process the change in the internal energy of the system is
One
Zero
Maximum
Negative
The rise in temperature when a gas is compressed suddenly to half of its original volume is_________ (Assume original temperature was 27oC and having  = 1.5)
114.5oC
125oC
124.2oC
147.1oC
At absolute temperature, value of specific heats (Cp and Cv) is
Maximum
Zero
Minimum
None of the above
The efficiency of an autmobile engine is 20% and it operates at 90 cycle per second. If it work at the rate of 120 hp, how much heat does the engine absorb per cycle?
4973 J
4450 J
4282 J
4000 J
Description:

First and second law , different kind of changes,are the topics on which the questions are based. Thermodynamics is a very impotrant chapter as far as entrance exams are concerned

Discussion

the answers need to be rechecked..some of them are incorrect....please check them

4521 days 23 hours 31 minutes ago

Kajal Sengupta
Physics 9th to 12 th grade,CIE, Edexcel, AP, IB , CBSE, ICSE
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