Chemistry 0620 · IGCSE · Formulae, functional groups and terminology

Formulae, functional groups and terminology — practice question

Organic compounds may consist only of carbon, hydrogen and oxygen.
(a)[2]

Calculate the empirical formula for compound R.

(b)[2]

Calculate the molecular formula for compound S.

(c(i))[1]

State the name used for compounds that have the same molecular formula but different structures.

(c(ii))[1]

Name the homologous series to which V belongs.

(c(iii))[3]

Draw the structure of compound T, showing every atom and every bond. Then name compound T.

(c(iv))[2]

Draw the structure of compound V, showing every atom and every bond. Then name compound V.

(d)[4]

For both steps, state the type of chemical reaction taking place and write the chemical equation. Step 1: decane to ethene. Step 2: ethene to ethanol.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: the empirical ratio obtained from the given data (e.g. 10:5:1)

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