The variation of density (p) of gas with its absolute temperature (T) at constant pressure is best represented by the graph

1.        2.

3.        4.

Concept Questions :-

Types of processes
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An ideal gas with adiabatic exponent y is heated at constant pressure and it absorbs Q heat. What fraction of this heat is used to perform external work

1.  $\mathrm{\gamma }$

2.  $\frac{\mathrm{\gamma }}{\mathrm{\gamma }}$

3.

4.

Concept Questions :-

Types of processes
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A Carnot engine working between 400K and 800K has a work output of 900J per cycle. The amount of heat energy supplied to engine from the source per cycle is

1.  900 J

2.  1800 J

3.  450 J

4.  2700 J

Concept Questions :-

Heat engine and refrigerator
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Temperature is defined by

1.  First Law of thermodynamics

2.  Second Law of thermodynamics

3.  Third Law of  thermodynamics

4.  Zeroth Law of  thermodynamics

Concept Questions :-

Basic terms
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The P-V diagram for a thermodynamic system is shown in the figure. The work done by the system during the cyclic process ABCA is

1.  Zero

2.  90 J

3.  30 J

4.  60 J

Concept Questions :-

Work done by gas
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If 32 gm of ${O}_{2}$ at $27°\mathrm{C}$ is mixed with 64 gm of ${\mathrm{O}}_{2}$ at $327°\mathrm{C}$ in an adiabatic vessel, then the final temperature of the mixture will be :

1.  $200°\mathrm{C}$

2.  $227°\mathrm{C}$

3.  $314.5°\mathrm{C}$

4.  $235.5°\mathrm{C}$

Concept Questions :-

Molar Specific heat
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If ${W}_{1}$ is the work done in compressing an ideal gas from a given initial state through a certain volume isothermally and ${W}_{2}$ is the work done in compressing the same gas from the same initial state through the same volume adiabatically, then:

(1) ${W}_{1}={W}_{2}$

(2) ${W}_{1}<{W}_{2}$

(3) ${W}_{1}>{W}_{2}$

(4) ${W}_{1}=2{W}_{2}$

Concept Questions :-

Work done by gas
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An ideal gas changes from state 'a' to state 'b' as shown in figure. What is the work done by the gas in the process?

1. zero

2. positive

3. negative

4. infinite

Concept Questions :-

Work done by gas
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

P-V graph of two gases during adiabatic processes are shown in figure. Plots 1 and 2 should correspond, respectively to :

1. He, ${\mathrm{O}}_{2}$

2. ${\mathrm{O}}_{2}$ and He

3. He and Ar

4. ${\mathrm{O}}_{2}$ and ${\mathrm{N}}_{2}$

Concept Questions :-

Molar Specific heat
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

For an ideal gas V-T curves at constant pressure ${\mathrm{P}}_{1}$ and ${\mathrm{P}}_{2}$ are shown in figure. From the figure

1. ${\mathrm{P}}_{1}>{\mathrm{P}}_{2}$

2. ${\mathrm{P}}_{1}<{\mathrm{P}}_{2}$

3. ${\mathrm{P}}_{1}={\mathrm{P}}_{2}$

4. ${\mathrm{P}}_{1}\le {\mathrm{P}}_{2}$

Concept Questions :-

Types of processes