Chemistry 0620 · IGCSE · Carboxylic acids

Carboxylic acids — practice question

Propane, propene, propan-1-ol and propanoic acid belong to different homologous series, but each molecule contains three carbon atoms.
(a)[1]

Explain why compounds in a homologous series have similar chemical properties.

(b)[1]

State which homologous series propanoic acid is part of.

(c)[1]

State the general formula for the homologous series that includes propanoic acid.

(d)[2]

Give the name of this isomer. Show its displayed formula.

(e(i))[2]

Complete the equation for this reaction. C$_{10}$H$_{22}$ → ................. + ................. + .................

(e(ii))[1]

Give the name of this manufacturing process.

(f(i))[2]

Draw the displayed formula for a section of poly(propene) showing three repeat units.

(f(ii))[1]

State the type of polymerisation that takes place when propene forms poly(propene).

(g(i))[1]

Suggest the salt's name.

(g(ii))[1]

Suggest the formula for the anion in this salt.

(h(i))[1]

Suggest a suitable catalyst.

(h(ii))[1]

Give the name of the ester formed.

(h(iii))[2]

Show the displayed formula for this ester.

Worked solution & mark scheme

This 17-mark question has a full step-by-step worked solution and mark scheme. One marking point: a shared functional group

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