For which of the following gases will the van | vedclass

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(C) The van der Waals constant $'a'$ represents the magnitude of attractive forces between gas molecules. Greater the intermolecular forces,higher is

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$NH_3$

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(C) The van der Waals constant $'a'$ represents the magnitude of attractive forces between gas molecules. Greater the intermolecular forces,higher is the value of $'a'$. Among the given gases,$NH_3$ is a polar molecule capable of forming hydrogen bonds,which results in strong intermolecular attractive forces. Therefore,$NH_3$ has the highest value of $'a'$ compared to the non-polar gases $He$,$H_2$,and $O_2$.

For which of the following gases will the van der Waals constant $'a'$ have the highest value?

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