I. 1,2-dihydroxybenzeneII. 1,3-dihydroxybenze | vedclass

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(B) The boiling point of phenolic compounds depends on intermolecular hydrogen bonding.$IV$ (Hydroxybenzene or phenol) has only one $-OH$ group,so it

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$IV < I < II < III$

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(B) The boiling point of phenolic compounds depends on intermolecular hydrogen bonding.$IV$ (Hydroxybenzene or phenol) has only one $-OH$ group,so it has the lowest boiling point.Among the dihydroxybenzenes $(I, II, III)$,the boiling point increases with the extent of intermolecular hydrogen bonding.$I$ ($1,2$-dihydroxybenzene or catechol) exhibits strong intramolecular hydrogen bonding,which reduces its ability to form intermolecular hydrogen bonds,leading to a lower boiling point compared to $II$ and $III$.$II$ ($1,3$-dihydroxybenzene or resorcinol) has a higher boiling point than $I$ due to more effective intermolecular hydrogen bonding.$III$ ($1,4$-dihydroxybenzene or hydroquinone) has the highest boiling point because its symmetrical structure allows for the most efficient intermolecular hydrogen bonding in the solid state.Therefore,the increasing order is $IV < I < II < III$.

$I$. $1,2$-dihydroxybenzene
$II$. $1,3$-dihydroxybenzene
$III$. $1,4$-dihydroxybenzene
$IV$. Hydroxybenzene
The increasing order of boiling points of the above-mentioned compounds is:

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$I$. $1,2$-dihydroxybenzene$II$. $1,3$-dihydroxybenzene$III$. $1,4$-dihydroxybenzene$IV$. HydroxybenzeneThe increasing order of boiling points of the above-mentioned compounds is: