A vessel contains 14 gm (7 moles) of hydrogen and 96 gm (3 moles) of oxygen at STP. A chemical reaction is induced by passing electric spark in the vessel till one of the gases is consumed. The temperature is brought back to it's starting value 273 K. The pressure in the vessel is

 

1.  0.1 atm                       

2.  0.2 atm

3.  0.3 atm                       

4.  0.4 atm

Subtopic:  Ideal Gas Equation |
 52%
From NCERT
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A jar contains a gas and few drops of water at T K. The pressure in the jar is 830 mm of mercury. The temperature of jar is reduced by 1%. The saturated vapour pressure of water at the two temperatures are 30 mm and 25 mm of mercury. Then the new pressure in the jar will be

1.  917 mm of Hg                       

2.  717 mm of Hg

3.  817 mm of Hg                       

4.  None of these

Subtopic:  Ideal Gas Equation |
 58%
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Molar specific heat of oxygen at constant pressure CP=7.2 cal/mol°C  and  R=8.3 joule/mol/K. At constant volume, 5 mol of oxygen is heated from 10°C to 20°C, the quantity of heat required is approximately

1.  25 cal                               

2.  50 cal

3.  250 cal                             

4.  500 cal

Subtopic:  Specific Heat |
 72%
From NCERT
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One mole of an ideal gas requires 207 J heat to raise the temperature by 10 K when heated at constant pressure. If the same gas is heated at constant volume to raise the temperature by the same 10 K, the heat required is

1.  198.7 J                 

2.  29 J

3.  215.3 J                 

4.  124 J

(Given the gas constant R=8.3 J/molK)

Subtopic:  Specific Heat |
 66%
From NCERT
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The expansion of an ideal gas of mass m at a constant pressure P is given by the straight line D. Then the expansion of the same ideal gas of mass 2m at a pressure P/ 2 is given by the straight line , where number on graphs indicate slope , is- 

1.  E                           

2.  C

3.  B                           

4.  A

Subtopic:  Ideal Gas Equation |
 51%
From NCERT
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An experiment is carried out on a fixed amount of gas at different temperatures and at high pressure such that it deviates from the ideal gas behaviour. The variation of PVRT with P is shown in the diagram. The correct variation will correspond to: (Assuming that the gas in consideration is nitrogen)

1. Curve A 2. Curve B
3. Curve C 4. Curve D
Subtopic:  Ideal Gas Equation |
 59%
From NCERT
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The figure below shows the graph of pressure and volume of a gas at two temperatures T1 and T2. Which one, of the following, inferences is correct?

 

1. \(\mathrm{T}_1>\mathrm{T}_2\)
2. \(\mathrm{T}_1=\mathrm{T}_2\)
3. \(\mathrm{T}_1<\mathrm{T}_2\)
4. No inference can be drawn

Subtopic:  Ideal Gas Equation |
 85%
From NCERT
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The expansion of unit mass of a perfect gas at constant pressure is shown in the diagram. Here

1. a = volume, b = °C temperature

2. a = volume, b = K temperature

3. a = °C temperature, b = volume

4. a = K temperature, b = volume

Subtopic:  Ideal Gas Equation |
From NCERT
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An ideal gas is initially at temperature T and volume V. Its volume increases by V due to an increase in temperature T, pressure remaining constant. The quantity δ=V/VT varies with temperature as:

1. 2.
3. 4.
Subtopic:  Ideal Gas Equation |
 56%
From NCERT
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Pressure versus temperature graph of an ideal gas of equal number of moles of different volumes are plotted as shown in figure. Choose the correct alternative

 

1. V1=V2 , V3=V4  and V2>V3

2. V1=V2 , V3=V4  and V2<V3

3. V1=V2 , V3=V4

4. V4>V3 > V2>V1

Subtopic:  Ideal Gas Equation |
 70%
From NCERT
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