Question

The boiling point of methanol is greater than methyl thiol because

• A. There is intramolecular hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol
• B. There is intermolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol
• C. There is no hydrogen bonding in methanol and intermolecular hydrogen bonding in methyl thiol
• D. There is no hydrogen bonding in methanol and intramolecular hydrogen bonding in methyl thiol.

Answer 1

Answer: (B)

There is intermolecular hydrogen bonding in methanol and no hydrogen bonding in methyl thiol

Answer 2

In methanol $(CH_3OH)$ intermolecular H-bonding increases the h.pt. S with lesser electronegativity (than O) and larger atomic size (than O) cannot take part in H-bonding as methyl thiol $(CH_3SH)$ has lower b.pt. than $CH_3OH$.