Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weight of A and B is:

1. 23

2. 34

3. 2

4. 12

Subtopic:  Ideal Gas Equation |
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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:  Law of Equipartition of Energy |
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The ratio of the specific heats CpCv=γ in terms of degrees of freedom(n) is given by:

1. 1+1n
2. 1+n3
3. 1+2n
4. 1+n2

Subtopic:  Specific Heat |
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The mean free path of molecules of a gas (radius 'r') is inversely proportional to:

1. r3

2. r2

3. r

4. r

Subtopic:  Mean Free Path |
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In the given (V–T) diagram, what is the relation between pressure P1 and P2
             

1. P> P1
2. P< P1
3. Cannot be predicted
4. P= P1

Subtopic:  Ideal Gas Equation |
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The amount of heat energy required to raise the temperature of 1 g of Helium at NTP, from TK to TK is:

1. 32NakBT2-T1

2. 34NakBT2-T1

3. 34NakBT2T1

4. 38NakBT2-T1

Subtopic:  Specific Heat |
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If Cp and Cv denote the specific heats (per unit mass) of an ideal gas of molecular weight M (where R is the molar gas constant), the correct relation is

1. Cp – Cv = R

2. Cp – Cv = R / M

3. Cp – Cv = MR

4. Cp – Cv = R / M2

Subtopic:  Specific Heat |
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At 10C the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At 110oC this ratio is:

1.  x

2.  383283x

3.  10110x

4.  283383x

Subtopic:  Ideal Gas Equation |
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