DP Chemistry (first assessment 2025)

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Question 22M.1A.HL.TZ1.12

Date	May 2022	Marks available	[Maximum mark: 1]	Reference code	22M.1A.HL.TZ1.12
Level	HL	Paper	1A	Time zone	TZ1
Command term	Deduce	Question number	12	Adapted from	N/A

12.

[Maximum mark: 1]

22M.1A.HL.TZ1.12

In which compound are all carbon atoms sp³ hybridized?

A. C₂H₂

B. C₂H₂Cl₂

C. C₂Cl₄

D. C₂Cl₆

[1]

Markscheme

D

Examiners report

76% of candidates correctly identified the organic compound in which all carbon atoms were sp² hybridized.

Syllabus sections

Structure 2. Models of bonding and structure » Structure 2.2—The covalent model » Structure 2.2.16—Hybridization is the concept of mixing atomic orbitals to form new hybrid orbitals for bonding. Analyse the hybridization and bond formation in molecules and ions. Identify the relationships between Lewis formulas, electron domains, molecular geometry and type of hybridization. Predict the geometry around an atom from its hybridization, and vice versa.