Critical temperature (T) is the measure of
intermolecular forces of attraction. The order of the critical
temperature of the given gases is as Tc(K)CO2304.2K>O2(154.3K)>N2(126.2K)>H2(33.2K)>He(5.2K)

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Q1

Gases posses charcteristic critical temperature which depends upo the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases.

From the above data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first

(a) H2,He,O2,N2 (b) He,O2,H2,N2

(c) N2,O2,He,H2, (d) O2,N2,H2,He

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Q2

GasesH2HeO2N2 Critical temperature(K)33.25.3154.3126 From the above data what whould be the order of liquefaction of these gases? Start writing the order from the gas liquefying first.

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Q3

The Van der waal's constant 'a' for gases CH4,N2,NH3 and O2 are 2.25, 1.39, 4.17 and 1.3 L2atmmol−2 respectively. The gas which shows highest critical temperature is:

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Q4

The values of critical pressures (Pc) and critical temperature (Tc) for O2,Cl2,H2 and he are given below The gas which has smallest value of van der Waal's constant 'b' is: