DP Chemistry (first assessment 2025)

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Question 21M.1A.SL.TZ2.20

Date	May 2021	Marks available	[Maximum mark: 1]	Reference code	21M.1A.SL.TZ2.20
Level	SL	Paper	1A	Time zone	TZ2
Command term	Identify	Question number	20	Adapted from	N/A

20.

[Maximum mark: 1]

21M.1A.SL.TZ2.20

Which causes acid deposition?

A. SO₂

B. SiO₂

C. SrO

D. CO₂

[1]

Markscheme

A

Syllabus sections

Structure 3. Classification of matter » Structure 3.1—The periodic table: Classification of elements » Structure 3.1.5—Metallic and non-metallic properties show a continuum. This includes the trend from basic metal oxides through amphoteric to acidic non-metal oxides. Deduce equations for the reactions with water of the oxides of group 1 and group 2 metals, carbon and sulfur.