Answer:
(i) Bigger is the size of volume,
greater is the value of van der Waals' constant 'b?
\[\xrightarrow[Increasing\text{ }value\text{ }of\text{
}b]{{{H}_{2}}<He<{{O}_{2}}<C{{O}_{2}}}\]
(ii)
Greater is the intermolecular force, more is the value of van der Waals'
constant 'a?.
\[\xrightarrow[Decreasing\text{
}value\text{ }of\text{ }a']{C{{H}_{4}}>{{O}_{2}}>{{H}_{2}}}\]
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