DP Chemistry (first assessment 2025)
Question 21M.1A.SL.TZ2.12
Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.1A.SL.TZ2.12 |
Level | SL | Paper | 1A | Time zone | TZ2 |
Command term | Deduce | Question number | 12 | Adapted from | N/A |
12.
[Maximum mark: 1]
21M.1A.SL.TZ2.12
Which is the correct order based on increasing strength?
A. covalent bonds < hydrogen bonds < dipole–dipole forces < dispersion forces
B. dipole–dipole forces < dispersion forces < hydrogen bonds < covalent bonds
C. dispersion forces < dipole–dipole forces < hydrogen bonds < covalent bonds
D. dispersion forces < dipole–dipole forces < covalent bonds < hydrogen bonds
[1]
Markscheme
C
Syllabus sections
Structure 2. Models of bonding and structure » Structure 2.2—The covalent model » Structure 2.2.9—Given comparable molar mass, the relative strengths of intermolecular forces are generally: London (dispersion) forces < dipole–dipole forces < hydrogen bonding. Explain the physical properties of covalent substances to include volatility, electrical conductivity and solubility in terms of their structure.