Liquefaction of Gases and Critical Constants

IMPORTANT

Liquefaction of Gases and Critical Constants: Overview

This topic covers concepts, such as, Liquefaction of Gases, Andrew's Isotherms, Expression of Critical Volume & Inversion Temperature etc.

Important Questions on Liquefaction of Gases and Critical Constants

EASY
IMPORTANT

An ideal gas can’t be liquefied because

MEDIUM
IMPORTANT

Which gas among the following is the easiest to liquify?

MEDIUM
IMPORTANT

The critical temperature of O2 is less than H2O because the H2O molecules have:

MEDIUM
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The expression of a in terms of Pc and Tc is:

HARD
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From Andrew's Isotherm experiment can be calculated.

HARD
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For which compound Andrew Thomson performed his experiment.

EASY
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The critical volume of a gas when expressed in terms of Van der Waals constants a and b takes the form:

MEDIUM
IMPORTANT

The van der Waals constant 'a' for different gases are given below:

Gas a (atm lit-2 mol-2)
O2  1.36
N2  1.39
CH4  2.25
NH3 4.17

The gas that can be most easily liquefied is

MEDIUM
IMPORTANT

Which one of the following gases has the highest critical temperature?

EASY
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If helium is allowed to expand in vacuum, it liberates heat because.

MEDIUM
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What is the correct increasing order of liquefiability of the gases shown as in the graph below?

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EASY
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The most favourable conditions to liquefy a gas are:-

MEDIUM
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For a real gas, the P-V curve was experimentally plotted, and it had the following appearance. With respect to liquefaction. Choose the correct statement.

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EASY
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If for the gases, the critical temperature mentioned below i.e.:

Gas Critical temp.
A TC1
B TC2
C TC3
D TC4

TC1>TC2>TC3>TC4

Which of the following can be predicted?

MEDIUM
IMPORTANT

An ideal gas can't be liquefied because :

EASY
IMPORTANT

Select the correct order followed by boyle's temperature (Tb), critical temperature Tc, and inversion temperature Ti .

EASY
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The temperature above which a gas cannot be liquefied by applying pressure is known as:

EASY
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What will be the value of VC (critical volume) ? 

MEDIUM
IMPORTANT

The correct order regarding magnitude of critical temperature TC , Boyle's temperature TB and inversion temperature Ti  for any particular gas is

HARD
IMPORTANT

What should be the volume occupied by 16 grams of oxygen gas (O2) at 300 K and 8.31 MPa, provided: 

P c V c RT c = 3 8 and P r V r T r = 2.21    

​(Given: R=8.314 cm3 MPa K-1 mol-1)