Question

Which of the following molecules is/are expected to form hydrogen bonds in the liquid state or solid state: H2SO4, HF, CH3OH, CH2O (formaldehyde)

Answer 1

Answer:

$H_{2}SO_{4}$, HF and $CH_{3}OH$ are expected to form hydrogen bonds in the liquid or solid state.

Explanation:

In liquid or solid state, intramolecular H-bonding takes place.

H-bonding is only formed when H atom remain attached with electronegative atoms such as O, F and N.

Formaldehyde contains no H atom attached to above mentioned electronegative atoms. Therefore formaldehyde does not form any hydrogen bonding in liquid or solid state.

All other given molecules contains H atom attached with any of the above mentioned electronegative atoms. Therefore all the molecules except formaldehyde is expected to form hydrogen bond in the liquid or solid state.

Lewis structures are given below.