Given van der Waals constant for NH3,H2,O2andCO2 are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?
A
CO2
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B
NH3
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C
O2
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D
H2
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Solution
The correct option is BNH3 van der Waal constant ′a′ , signifies intermolecular forces of attraction.
Higher is the value of ′a′ , easier will be the liquefaction of gas.
Hence, option (b) is correct.