Chemistry 0620 · IGCSE · Formulae, functional groups and terminology

Formulae, functional groups and terminology — practice question

Alkanes and alkenes are both types of hydrocarbons.
(a(i))[1]

What does the term hydrocarbon mean?

(a(ii))[2]

State the general formulae for straight-chain alkanes and alkenes.

(b(i))[2]

Calculate the empirical formula for compound X.

(b(ii))[2]

Deduce the molecular formula for compound X.

(c)[4]

Name two esters with the molecular formula $\text{C}_3\text{H}_6\text{O}_2$ and write their structural formulae.

(d)[1]

Name the ester formed when propanoic acid reacts with methanol.

(e(i))[1]

Which type of polymerisation is used to make polyesters?

(e(ii))[1]

Which small molecule is eliminated when the polyester is formed?

(e(iii))[2]

Finish the diagrams below so they show the monomer structures used to make the polyester. Display every atom and bond.

Worked solution & mark scheme

This 16-mark question has a full step-by-step worked solution and mark scheme. One marking point: a compound made only of carbon and hydrogen atoms

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