8 past paper MCQs on Hydrogen Bonding, from the Liquids unit of MDCAT Chemistry. The year each question appeared is shown where known; tap “Show answer” for the correct option and a short solution.
1.Which of the following does NOT have a tendency to form hydrogen bonding? (MDCAT 2024)
Correct answer: (d) hydrocarbon
Hydrogen bonding needs hydrogen bound to a small, strongly electronegative atom, and a hydrocarbon has none.
2.Hydrogen bonding does not exist in: (NUMS MDCAT 2025)
Correct answer: (d) SiH4
A hydrogen bond needs hydrogen bound to nitrogen, oxygen or fluorine; silicon is far too weakly electronegative.
3.Which one of the following DO NOT have tendency to form hydrogen bonding? (UHS MDCAT 2024)
Correct answer: (d) Hydrocarbon
A hydrocarbon has no hydrogen bound to nitrogen, oxygen or fluorine, so it cannot hydrogen bond.
4.When two ice cubes are pressed over each other, they unite to form one cube due to: (SZABMU MDCAT 2023)
Correct answer: (d) H - bonding
The pressure melts a film of water, which freezes again as hydrogen bonds form across the join.
5.The strongest hydrogen bond is present in: (SZABMU MDCAT 2023)
Correct answer: (b) HF
Fluorine is the most electronegative, so the hydrogen bond in hydrogen fluoride is the strongest.
6.When 2 ice cubes are pressed over each other they unite to form one cube due to: (NUMS MDCAT 2023)
Correct answer: (d) H-bonding
The pressure melts a film of water, which freezes again as hydrogen bonds form across the join.
7.Which of the following substances has the largest intermolecular forces of attraction? (PMC MDCAT 2022)
Correct answer: (a) H2O
Water alone hydrogen bonds; the others are held only by dipole and dispersion forces.
8.Which of the following substances exhibits hydrogen bonding? (UHS MDCAT 2019)
Correct answer: (c) NH3
Only ammonia has hydrogen bound to nitrogen, oxygen or fluorine.