# The ratio a/b (the terms used in van der Waals' equation) has the unit- 1. atm litre mol-1                            2. atm dm3 mol-1 3. dyne cm mol-1                            4. All of the above

Subtopic:  van der Waal’s Correction |
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At relatively high pressure, van der Waals' equation reduces to-

1. PV = RT

2. PV = RT + a/v

3. PV = RT + Pb

4. PV = RT - a/V2

Subtopic:  van der Waal’s Correction |
56%
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The maximum deviation from ideal gas behaviour takes place -

1. At high temperature and low pressure.

2. At low temperature and high pressure.

3. At high temperature and high pressure.

4. At low temperature and low pressure.

Subtopic:  Kinetic Theory of Gas |
61%
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Joule-Thomson coefficient ($\partial \mathrm{T}/\partial \mathrm{P}$)H for an ideal gas is:

1. zero

2. +ve

3. -ve

4. none of these

Subtopic:  Liquefaction of Gases & Liquid |
63%
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All the three states H2O, i.e., the triple point for H2O the equilibrium,

Ice $⇌$Water$⇌$Vapour exist at:

1. 3.85 mm and 0.0981 $°$C

2. 4.58 mm and 0.0098 $°$C

3. 760 mm and 0$°$C

4. none of the above

Subtopic:  Liquefaction of Gases & Liquid |
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The unit of van der Waals' constant 'a' is:

1. atm litre2 mol-2

2. dyne cm4 mol-2

3. newton m4 mol-2

4. All of the above

Subtopic:  van der Waal’s Correction |
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The unit of van der Waals' constant 'b' is :

1. cm3 mol-1

2. litre mol-1

3. m3 mol-1

4. All of these

Subtopic:  van der Waal’s Correction |
80%
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At STP, 0.50-mole H2 gas and 1.0 mole He gas

1. have equal average kinetic energies

2. have equal molecular speeds

3. occupy equal volumes

4. have equal effusion rates

Subtopic:  Kinetic Theory of Gas |
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The beans are cooked in pressure cooker, because -

1. Boiling point increases with increasing pressure

2. Boiling point decreases with increasing pressure

3. Extra pressure of pressure cooker softens the beans

4. Internal energy is not lost while cooking in pressure cooker

Subtopic:  Gas Laws |
54%
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An ideal gas cannot be liquified because

1. its critical temperature is always above 0$°$C

2. its molecules are relatively smaller in size

3. it solidifies before becoming a liquid

4. forces operating between its molecules are negligible

Subtopic:  Ideal Gas Law |
71%
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