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a
van der Waals constant a and b of NH3 > that of N2
b
van der Waals constant a and b of NH3 < that of N2
c
a (NH3) > a (N2) but b (NH3) < b (N2)
d
a (NH3) < a (N2) but b (NH3) > b (N2)
answer is C.
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Detailed Solution
'a' represents intere molecular force of attractions. Due to intermolecular hydrogen bonding 'a' value is higher for NH3.Size of N2 is greater than NH3