A gas expands under constant pressure P from volume V1 toV2. The work done by the gas is 

(1) P(V2V1)

(2) P(V1V2)

(3) P(V1γV2γ)

(4) PV1V2V2V1

Subtopic:  Work Done by a Gas |
 88%
From NCERT
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When heat is given to a gas in an isobaric process, then 

(1) The work is done by the gas

(2) Internal energy of the gas increases

(3) Both (1) and (2)

(4) None from (1) and (2)

Subtopic:  Types of Processes |
 78%
From NCERT
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A gas expands 0.25m3 at constant pressure 103 N/m2, the work done is -

(1) 2.5 ergs

(2) 250 J

(3) 250 W

(4) 250 N

Subtopic:  Work Done by a Gas |
 88%
From NCERT
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Which of the following is correct in terms of increasing work done for the same change in volume?

(1) Adiabatic < Isothermal < Isobaric

(2) Isobaric < Adiabatic < Isothermal

(3) Adiabatic < Isobaric < Isothermal

(4) None of these

Subtopic:  Work Done by a Gas |
 64%
From NCERT
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A sample of gas expands from volume V1 to V2. The amount of work done by the gas is greatest when the expansion is 

(1) Isothermal

(2) Isobaric

(3) Adiabatic

(4) Equal in all cases

Subtopic:  Work Done by a Gas |
 72%
From NCERT
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A Container having 1 mole of a gas at a temperature 27°C has a movable piston which maintains constant pressure in a container of 1 atm. The gas is compressed until the temperature becomes 127°C. The work done is:

(1) 703 J

(2) 831 J

(3) 121 J

(4) 2035 J

Subtopic:  Work Done by a Gas |
 70%
From NCERT
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Entropy of a thermodynamic system does not change when this system is used for -

(1) Conduction of heat from a hot reservoir to a cold reservoir

(2) Conversion of heat into work isobarically

(3) Conversion of heat into internal energy isochorically

(4) Conversion of work into heat isochorically

Subtopic:  Types of Processes |
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Which is incorrect ?

(1) In an isobaric process, Δp = 0

(2) In an isochoric process, ΔW = 0

(3) In an isothermal process, ΔT = 0

(4) In an isothermal process, ΔQ = 0

Subtopic:  Types of Processes |
 86%
From NCERT
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A Carnot engine working between 300 K and 600K has work output of 800 J per cycle. What is amount of heat energy supplied to the engine from source per cycle ?

(1) 1800 J/cycle

(2) 1000 J/cycle

(3) 2000 J/cycle

(4) 1600 J/cycle

Subtopic:  Heat Engine & Refrigerator (OLD NCERT) |
 82%
From NCERT
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In a cyclic process, the internal energy of the gas:

1. Increases 2. Decreases
3. Remains constant 4. Becomes zero
Subtopic:  Cyclic Process |
 54%
From NCERT
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