Given that van der Waals constant for NH_(3), H_(2),O_(2) and CO_(2) are respectively 4.17, 0.244, 1.36 and 3.59. Which one of the following gases is most easily liquefied ?

Given that van der Waals constant for NH_(3), H_(2),O_(2) and CO_(2) a

1.	Given that van der Waals constant for NH_(3), H_(2),O_(2) and CO_(2) are respectively 4.17, 0.244, 1.36 and 3.59. Which one of the following gases is most easily liquefied ?
Answer» `NH_(3)` `H_(2)` `O_(2)` `CO_(2)` Solution :van der Waals constant 'a' GIVES a magnitude of intermolecular forces of attraction. Greater the value of 'a', greater are the intermolecular forces of attraction and more easily the GAS is liquefied. HENCE, `NH_(3)` is liquefied most easily.