Chemistry 0620 · IGCSE · Alkenes

Alkenes — practice question

Coal gas is produced when coal is heated without air present. The chief gases in coal gas are listed below: carbon dioxide carbon monoxide ethene hydrogen methane nitrogen
(a(i))[1]

Which gas in the list is an alkane?

(a(ii))[1]

Draw the structure of an ethene molecule. Include every atom and every bond.

(a(iii))[2]

Describe how aqueous bromine can be used to distinguish methane from ethene.

(b(i))[1]

What name is used for this kind of chemical reaction?

(b(ii))[1]

Which of the following words describes the ethene molecules in this reaction? Circle the correct choice. elements mixtures monomers polymers

(b(iii))[1]

What does the term non-biodegradable mean?

(b(iv))[1]

Describe one pollution issue linked to non-biodegradable plastics.

(c)[3]

Name the other reactant. State the conditions needed to prepare ethanol from ethene.

Worked solution & mark scheme

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