Chemistry 0620 · IGCSE · Formulae, functional groups and terminology

Formulae, functional groups and terminology — practice question

Lavandulol is a compound present in lavender flowers. Its structure is displayed.
(a)[1]

On the diagram, circle the alcohol functional group.

(b)[1]

How many carbon atoms are present in one molecule of lavandulol?

(c(i))[1]

What part of the lavandulol structure indicates that it is unsaturated?

(c(ii))[2]

Describe a test for showing that lavandulol is unsaturated. test ............ result ............

(d)[2]

Arrange statements A, B, C, D and E in the right sequence. The first step has already been completed for you.

(e)[3]

After a few minutes the solvent vapour spreads through the entire chromatography jar. Use the kinetic particle model to explain this.

(f(i))[1]

At the beginning of the experiment, where were the dyes put on the chromatography paper?

(f(ii))[1]

Which dye mixture had the greatest number of dyes?

(f(iii))[1]

Which dye mixture contained both dye X and dye Y?

Worked solution & mark scheme

This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: Circle the -OH group

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