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

Question

Which causes acid deposition?

A. SO₂

B. SiO₂

C. SrO

D. CO₂

Markscheme

A

Examiners report

[N/A]

Syllabus sections

Core » Topic 8: Acids and bases » 8.5 Acid deposition

18M.2.sl.TZ1.5b:
Dissolved carbon dioxide causes unpolluted rain to have a pH of approximately 5, but other dissolved gases can result in a much lower pH. State one environmental effect of acid rain.
22M.2.sl.TZ2.3c(i): State the product formed from the reaction of SO3 with water.
18M.2.hl.TZ2.2e.i:
Formulate the equation for the reaction of nitrogen dioxide, NO₂, with water to form two acids.
16N.2.sl.TZ0.3b:
Suggest why the experiment should be carried out in a fume hood or in a well-ventilated laboratory.
18M.2.hl.TZ2.2e.ii:
Formulate the equation for the reaction of one of the acids produced in (e)(i) with calcium carbonate.
18N.3.sl.TZ0.1a: Outline why the initial reaction should be carried out under a fume hood.
18N.3.hl.TZ0.1a: Outline why the initial reaction should be carried out under a fume hood.
19M.1.sl.TZ1.20: Which is not a source of oxides of sulfur and nitrogen? A. burning coal B. internal...
19M.1.sl.TZ2.20:
What is the major reason why the pH of unpolluted rain is less than 7?

A. methane

B. carbon dioxide

C. nitrogen oxides

D. sulfur dioxide
17M.2.sl.TZ2.5c:
State the equation for the reaction of NO₂ in the atmosphere to produce acid deposition.
19M.1.hl.TZ2.25:
What is the major reason why the pH of unpolluted rain is less than 7?

A. methane

B. carbon dioxide

C. nitrogen oxides

D. sulfur dioxide
18M.2.hl.TZ1.5b:
Dissolved carbon dioxide causes unpolluted rain to have a pH of approximately 5, but other dissolved gases can result in a much lower pH. State one environmental effect of acid rain.
21M.2.hl.TZ1.1e(iii): Suggest why this process might raise environmental concerns.
21M.2.sl.TZ2.1f:
Outline how one calcium compound in the lime cycle can reduce a problem caused by acid deposition.
21M.2.sl.TZ1.1d(iii): Suggest why this process might raise environmental concerns.
22M.2.hl.TZ2.6d(i):
State the product formed from the reaction of SO₃ with water.
20N.1.hl.TZ0.24:
Which of these oxides contribute to acid deposition?

I.   ${SO}_{2}$
II.   ${NO}_{2}$
III.   ${CO}_{2}$

A. I and II only

B. I and III only

C. II and III only

D. I, II and III
21M.2.hl.TZ2.1e:
Outline how one calcium compound in the lime cycle can reduce a problem caused by acid deposition.

Core » Topic 8: Acids and bases