Air quality and climate Part 1

Which pie chart represents the composition of clean air?

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2. The diagram shows the composition of clean air.

What are X and Y?

• X: carbon dioxide

  Y: oxygen

• X: nitrogen

  Y: oxygen

• X: oxygen

  Y: carbon dioxide

• X: oxygen

  Y: nitrogen

Some information about gas X is listed.

● It is not present in clean, dry air.

● It is not a cause of respiratory problems.

● It is responsible for global warming.

What is X?

• A

  carbon dioxide

• B

  carbon monoxide

• C

  methane

• D

  nitrogen dioxide

A petrol car engine takes in clean air and lets out exhaust gases.

Which gas has a higher concentration in the exhaust gases than in clean air?

• A

  Argon

• B

  Carbon dioxide

• C

  Nitrogen

• D

  Oxygen

Which process does not produce carbon dioxide?

• A

  complete combustion of fossil fuels

•     B

  reaction of an acid with a carbonate

• C

  respiration in plants

• D

  rusting iron

Which gases damage buildings?

• A

  carbon dioxide and carbon monoxide

• B

  carbon dioxide and sulfur dioxide

• C

  carbon monoxide and nitrogen dioxide

• D

  nitrogen dioxide and sulfur dioxide

Impurities are unwanted substances in mixtures. Impurities can be removed using purification

techniques.

(a) Some gaseous oxides are impurities which pollute air.

(i) Name the gaseous oxide that forms when sulfur burns.

7a (ii) Describe how this gaseous oxide (from 7a(i)) can damage the environment.

Fill in the blanks below:

Two gaseous oxides, other than water vapour or carbon dioxide, that can form

during the combustion of hydrocarbons in air is

(i) __________________ and (ii)_____________________

The figure shows diagrams of some of the molecules in air.

Draw a label line to a molecule of an element

and label it E.