Chemistry 0620 · IGCSE · Alkanes

Alkanes — practice question

Methane, ethane and ethene are all hydrocarbons.
(a)[1]

Draw the structure of an ethane molecule. Show every atom and every bond.

(b)[1]

Which one of these compounds is in the same homologous series as methane? butane, methanoic acid, methanol, propene

(c(i))[2]

Complete the sentence about cracking by using words from the list. Cracking is the process of breaking down [BLANK] alkane [BLANK] into [BLANK] alkanes and alkenes.

(c(ii))[2]

State two conditions required for cracking.

(d)[1]

Which of the structures shows part of a poly(ethene) molecule? Tick one box.

(e(i))[1]

Give one common use of nylon.

(e(ii))[1]

How many distinct types of atom are shown in this structure?

(f(i))[1]

Which structural feature of this molecule indicates that it is unsaturated?

(f(ii))[2]

Describe a test to demonstrate that this compound is unsaturated. test observations

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: correct displayed formula for propane

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