The values of van der Waals' constant 'a' for | vedclass

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(C) The van der Waals' constant '$a$' is a measure of the magnitude of intermolecular attractive forces in a gas.Greater the value of '$a$',stronger a

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$NH_3$

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(C) The van der Waals' constant '$a$' is a measure of the magnitude of intermolecular attractive forces in a gas.Greater the value of '$a$',stronger are the intermolecular forces.Stronger intermolecular forces make it easier for a gas to be liquefied.Comparing the given values: $O_2 (1.360) Since $NH_3$ has the highest value of '$a$',it can be most easily liquefied.

The values of van der Waals' constant '$a$' for gases $O_2, N_2, NH_3$,and $CH_4$ are $1.360, 1.390, 4.170$,and $2.253 \ L^2 \ atm \ mol^{-2}$ respectively. The gas which can be most easily liquefied is

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