Thermodynamic processes are indicated in the following diagram.
          
Match the following:

Column I Column II
P.   Process-I        a.    Adiabatic      
Q. Process-II  b. Isobaric
R. Process-III  c. Isochoric
S. Process-IV d.   Isothermal
 
1. \(P \rightarrow \mathrm{a}, Q \rightarrow \mathrm{c}, R \rightarrow \mathrm{d}, S \rightarrow \mathrm{b}\)
2. \(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{a}, R \rightarrow \mathrm{d}, S \rightarrow b\)
3. \(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow a\)
4. \(P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow a\)

Subtopic:  Types of Processes |
 87%
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A carnot engine having an efficiency of 110th of heat engine, is used as a refrigerator. If then work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is:

1. 1 J

2. 90 J

3. 99 J

4. 100 J 

Subtopic:  Heat Engine & Refrigerator (OLD NCERT) |
 61%
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NEET - 2017
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The temperature inside a refrigerator is t2C and the room temperature is t1C. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be:

1. t1t1-t2

2.  t1+273t1-t2

3. t2+273t1+t2

4.  t1+t2t1+273

Subtopic:  Heat Engine & Refrigerator (OLD NCERT) |
 59%
From NCERT
NEET - 2016
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A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then:

1. compressing the gas through an adiabatic process will require more work to be done.
2. compressing the gas isothermally or adiabatically will require the same amount of work to be done.
3. which of the case (whether compression through isothermal or through the adiabatic process) requires more work to be done will depend upon the atomicity of the gas.
4. compressing the gas isothermally will require more work to be done.



 

Subtopic:  Work Done by a Gas |
 70%
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NEET - 2016
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Figure below shows two paths that may be taken by a gas to go from a state A to a state C. In process AB, 400 J of heat is added to the system and in process BC, 100 J of heat is added to the system. The heat absorbed by the system in the process AC will be-


(a) 380 J 
(b) 500 J
(c) 460 J
(d) 300 J

Subtopic:  First Law of Thermodynamics |
 58%
From NCERT
NEET - 2015
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One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure.

The change in internal energy of the gas during the transition is

(1) 20 kJ

(2) -20 kJ

(3) 20 J

(4) -12 kJ

Subtopic:  Molar Specific Heat |
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NEET - 2015
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An ideal gas is compressed to half its initial volume by means of several processes. Which of the following processes results in the maximum work being done on the gas?
1. Adiabatic
2. Isobaric
3. Isochoric
4. Isothermal

Subtopic:  Work Done by a Gas |
 70%
From NCERT
NEET - 2015
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The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20°C, the temperature of the surroundings to which it rejects heat is  -

1. 31°C

2. 41°C

3. 11°C

4. 21°C

Subtopic:  Heat Engine & Refrigerator (OLD NCERT) |
 58%
From NCERT
NEET - 2015
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A thermodynamic system undergoes cyclic process ABCDA as shown in figure. The work done by the system in the cycle is



(1) ρoV

(2) 2ρoVo

(3) ρoVo/2

(4)zero

Subtopic:  Cyclic Process |
 74%
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NEET - 2014
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A gas is taken through the cycle A→B→C→A, as shown. What is the net work done by the gas?

(1)2000J

(2)1000J

(3)Zero

(4)-2000J

Subtopic:  Work Done by a Gas |
 70%
From NCERT
NEET - 2013
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