Chemistry 0620 · IGCSE · Formulae, functional groups and terminology

Formulae, functional groups and terminology — practice question

A structure for compound S is shown.
(a(i))[1]

Draw one circle to show the carboxylic acid functional group in this structure.

(a(ii))[1]

How many distinct atom types appear in this structure?

(b(i))[2]

At 100 $^\circ$C, what state is pure S in? Explain your answer.

(b(ii))[1]

Which statement about an impure sample of compound S is correct? Tick one box.

(c)[2]

Describe two chemical properties shown by aqueous ethanoic acid.

(d(i))[1]

Identify the compound X.

(d(ii))[1]

Explain the reason a catalyst is used.

(d(iii))[1]

Draw the structure of one ethanol molecule. Include every atom and every bond.

(e(i))[1]

State the name of the polymer made from ethene.

(e(ii))[1]

State one use for Terylene.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: circle only the COOH group

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