Liquefaction of Gases

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Liquefaction of Gases: Overview

This topic covers concepts such as Liquefaction of Gases, Andrew's Isotherms, Analysis of Andrew's Isotherms, Andrew Isotherm of Carbon Dioxide, Critical Temperature of Gases, and Expression of Critical Temperature.

Important Questions on Liquefaction of Gases

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The cascade method is used to liquify

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The Andrew's experiment is the test for the validity of 

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The critical volume of a gas is 0.036 l.mol1 . What will be the radius of the molecule in cm?

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The radius of a molecule is 1.5×10-8 cm. Calculate the critical volume of the gas.

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The critical volume of a gas is 0.072 l.mol1 . What will be the radius of the molecule in cm?

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What is critical volume? Give its formula.

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Which gas among the following is the easiest to liquify?

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

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

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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:

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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

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Maximum deviation from ideal gas is expected from:

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An ideal gas obeying kinetic theory of gases can be liquefied if

 

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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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The most favourable conditions to liquefy a gas are:-

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The gas with the highest critical temperature is

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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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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?

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A gas can be liquiefied:

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An ideal gas can't be liquefied because :