Thermodynamics (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 17  22 of 86
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Question number: 17
» Thermodynamics » Concept of Temperature
Question
For an adiabatic expansion of a perfect gas, the value of is equal to
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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Question number: 18
» Thermodynamics » Concept of Temperature
Question
One mole of a perfect gas in a cylinder fitted with a piston has a pressure P, volume V and temperature T. If the temperature is increased by 1 K keeping pressure constant, the increase in volume is
Choices
Choice (4)  Response  

a. 


b. 


c.  V 

d. 


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Question number: 19
» Thermodynamics » Thermal Equilibrium
Assertion (Ꭺ)
The isothermal curves intersect each other at a certain point.
Reason (Ꭱ)
The isothermal change takes place slow; so the isothermal curves have very little slope.
Choices
Choice (4)  Response  

a.  Ꭺ is false but Ꭱ is true 

b.  Ꭺ is true but Ꭱ is false 

c.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

d.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

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Question number: 20
» Thermodynamics » Concept of Temperature
Question
Work done by 0.1 mole of a gas at 27°C to double its volume at constant pressure is (R = 2 cal mol °K)
Choices
Choice (4)  Response  

a.  546 cal 

b.  600 cal 

c.  60 cal 

d.  54 cal 

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Question number: 21
» Thermodynamics » Concept of Temperature
Question
An ideal gas at 27°C is compressed adiabatically to of its original volume. If , then the rise in temperature
Choices
Choice (4)  Response  

a.  450 K 

b.  405 K 

c.  225 K 

d.  375 k 

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Question number: 22
» Thermodynamics » Concept of Temperature
Question
An ideal gas expands isothermally from a volume V _{1} to V _{2} and then compressed to original volume V _{1} adiabatically. Initial pressure is P _{1} and final pressure is P _{3}. The total work done is W. Then
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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