CAIE IGCSE Chemistry 10.3 Air Quality and Climate Topic Practice

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Covered syllabus points

10.3.1—Composition of clean, dry air as10.3.2—Air pollutant sources: CO2 from10.3.3—Pollutant effects: CO2 and methane10.3.7—Greenhouse gases carbon dioxide and10.3.4—Reduction strategies: for climate10.3.5—Photosynthesis as the reaction between10.3.6—Word equation for photosynthesis10.3.8—How oxides of nitrogen form in car10.3.9—Symbol equation for photosynthesis

Question 1

[Maximum number: 1]

The apparatus shown is set up and left for a week.

Figure for Question 1 — CAIE IGCSE Chemistry

Which diagram shows the level of the water at the end of the week?

A

See water-level diagram A in the official apparatus figure.

B

See water-level diagram B in the official apparatus figure.

C

See water-level diagram C in the official apparatus figure.

D

See water-level diagram D in the official apparatus figure.

Question 2

[Maximum number: 1]

Which element has an oxide that is used as a food preservative?

A

helium

B

hydrogen

C

iron

D

sulfur

Question 3

[Maximum number: 1]

Which compounds both contribute to acid rain?

A

carbon monoxide and carbon dioxide

B

carbon monoxide and oxides of nitrogen

C

oxides of nitrogen and sulfur dioxide

D

sulfur dioxide and carbon dioxide

Question 4

[Maximum number: 1]

Which information about carbon dioxide and methane is correct?

carbon dioxide

methane

key

✓

×\boldsymbol{\times}

✓

✓

✓ = correct

χ\boldsymbol{\chi}

×\boldsymbol{\times}

x=\boldsymbol{x}= not correct

×\boldsymbol{\times}

✓

Question 5

[Maximum number: 1]

Which oxide is used to neutralise acidic gases in flue gas desulfurisation?

A

calcium oxide

B

carbon dioxide

C

nitrogen oxide

D

sulfur dioxide

Question 6

[Maximum number: 1]

Which process in the carbon cycle is responsible for removing carbon dioxide from the atmosphere?

A

combustion

B

decomposition

C

photosynthesis

D

respiration

Question 7

[Maximum number: 1]

Which process does not produce carbon dioxide?

A

combustion of methane

B

photosynthesis

C

respiration

D

thermal decomposition of calcium carbonate

Question 8

[Maximum number: 1]

Oxides of nitrogen are produced by car engines.
In a catalytic converter oxides of nitrogen are removed by reacting them with compound X .

Which row describes the type of reaction oxides of nitrogen undergo and identifies compound X ?

type of reaction

compound X

oxidation

carbon dioxide

oxidation

carbon monoxide

reduction

carbon dioxide

reduction

carbon monoxide

Question 9

[Maximum number: 1]

The incomplete equation for photosynthesis is shown.

wCO2+xH2O→P+yO2w \mathrm{CO}_{2}+x \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{P}+y \mathrm{O}_{2}

Compound P is a product of the reaction.

Which row describes the values of w, x and y and gives the empirical formula of compound P ?

values of w, x and y

empirical formula
of compound P

w, x and y are all the same

CH2O\mathrm{CH}_{2} \mathrm{O}

w, x and y are all the same

C6H12O6\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}

w and x are the same and both are greater than y

CH2O\mathrm{CH}_{2} \mathrm{O}

w and x are the same and both are greater than y

C6H12O6\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}

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