Which of the following statements is/are correct

Options

A. PhoH has a higher boiling point than PhSH (benzenethiol).
B. p-Huydroquinone has a higher melting point than catethol.
C. o-Nitrophenol has a lower boiling point than m-and p-isomers.
D. o-Hydroxybenzaldehyde is more water soluble than m- and p- isomers.

Answer

A, B, C

Explanation

a. PhOH has higher point due to H-bonding.
b. Molecules of p-benzonoquinoe can fit closer in solid state causing it to have higher melting point.
c. and d.
Intramolecular H-bonding (chelation) in the o-isomers inhibits the intermolecular attraction. lowers the boiling point, reduces H-bonding with `H_(2)O`, and decreases warter solubilities. Intra-molecular chelation does not occur in m-and p-isomers.