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\( \mathrm{NH}_{3} \) gas is liquefied more easily than \( \mathrm{N}_{2} \). Hence
P
(1) van der Waal's constants ' \( a \) ' and ' \( b \) ' of
W \( \mathrm{NH}_{3} \) that of \( \mathrm{N}_{2} \)
(2) van der Waal's constants ' \( a \) ' and ' \( b \) ' of \( \mathrm{NH}_{3} \) that of \( \mathrm{N}_{2} \)
(3) \( a\left(\mathrm{NH}_{3}\right)a\left(\mathrm{~N}_{2}\right) \) but \( b\left(\mathrm{NH}_{3}\right)b\left(\mathrm{~N}_{2}\right) \)
(4) \( a\left(\mathrm{NH}_{3}\right)a\left(\mathrm{~N}_{2}\right) \) but \( b\left(\mathrm{NH}_{3}\right)b\left(\mathrm{~N}_{2}\right) \)
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