For matter to exist simultaneously in gas and liquid phases :

1. The temperature must be 0 K.

2. The temperature must be less than 0°C.

3. The temperature must be less than the critical temperature.

4. The temperature must be less than the reduced temperature.

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The value of critical temperature in terms of Vander Waal’s constant a and b is

1. Tc=8 a27 Rb                           

2. Tc=a2 Rb

3. Tc=827 Rb                             

4. Tc=27 a8 Rb

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In Vander Waal’s equation, a and b represent P+aV2v-b=RT

1. Both a and b represent correction in volume

2. Both a and b represent adhesive force between molecules

3. a represents adhesive force between molecules and b correction in volume

4. a represents correction in volume and b represents adhesive force between molecules

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At 0°C the density of a fixed mass of a gas divided by pressure is x. At 100°C, the ratio will be:

1. x                                   

2. 273373x

3. 373273x                           

4. 100273x

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At what temperature volume of an ideal gas at 0°C becomes triple :

1. 546°C                                 

2. 182°C

3. 819°C                                 

4. 646°C

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Types of velocity
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If an ideal gas has volume V at 27°C and it is heated at a constant pressure so that its volume becomes 1.5V. Then the value of final temperature will be

1. 600°C                             

2. 177°C

3. 817°C                             

4. None of these

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A tyre kept outside in sunlight bursts off after sometime because of :

1. Increase in pressure                                 

2. Increases in volume

3. Both (a) and (b)                                       

4. None of these

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Specific heat
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In Boyle's law what remains constant :

1. PV                                     

2. TV

3. VT                                     

4. PT

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Equation of gas in terms of pressure (P), absolute temperature (T) and density (d) is :

1. P1T1d1=P2T2d2                                 

2. P1T1d1=P2T2d2

3. P1d2T1=P2d1T1                                 

4. P1d1T1=P2d2T2

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The figure shows two flasks connected to each other. The volume of the flask 1 is twice that of flask 2. The system is filled with an ideal gas at temperature 100 K and 200 K respectively. If the mass of the gas in flask 1 be m, then what is the mass of the gas in flask 2?

         

1. m                                       

2. m2

3. m4                                     

4. m8

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Types of velocity
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