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Amit Saxena Grade: upto college level
         The value of van der Waals’ constant ‘a’ for the gases O2, N2, NH3 and CH4 are 1.360, 1.390, 4.170 and 2.253L2 atm mol-2 respectively. The gas which can most easily be liquefied is 

a. O2
b. N2
c. NH3
d CH4
3 years ago

Answers : (1)

Jitender Pal
askIITians Faculty
365 Points
										Sol.   The ease of liquification of a gas depends on their intermolecular force of attraction which in turn is measured in terms of van der Waals’ constant ‘a’. Hence, higher the value of ‘a’, greater the intermolecular force of attraction, easier the liquification.

In the present case, NH3 has highest ‘a’, can most easily be liquefied.
3 years ago
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