DP Chemistry (first assessment 2025)
Question 20N.1A.HL.TZ0.11
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.1A.HL.TZ0.11 |
| Level | HL | Paper | 1A | Time zone | TZ0 |
| Command term | Interpret | Question number | 11 | Adapted from | N/A |
11.
[Maximum mark: 1]
20N.1A.HL.TZ0.11
Which combination correctly describes the geometry of ?
[1]
Markscheme
C
Examiners report
Identifying correct electron domain and molecular geometries around a central atom was answered well by the better candidates. This had the highest discrimination index of all the questions.
Syllabus sections
Structure 2. Models of bonding and structure » Structure 2.2—The covalent model » Structure 2.2.13—Some atoms can form molecules in which they have an expanded octet of electrons. Visually represent Lewis formulas for species with five and six electron domains around the central atom. Deduce the electron domain geometry and the molecular geometry for these species using the VSEPR model.