DP Chemistry (first assessment 2025)

Test builder »

Question 19N.1A.HL.TZ0.12

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.1A.HL.TZ0.12
Level	HL	Paper	1A	Time zone	TZ0
Command term	Deduce	Question number	12	Adapted from	N/A

12.

[Maximum mark: 1]

19N.1A.HL.TZ0.12

Which atom is sp² hybridized?

A. C in H₂CO

B. C in CO₂

C. N in CH₃NH₂

D. O in H₂O

[1]

Markscheme

A

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.