Chemistry 0620 · IGCSE · Formulae, functional groups and terminology

Formulae, functional groups and terminology — practice question

Compound E in Fig. 6.1 is an ester, and Fig. 6.1 displays the structure CH3-CH2-CH2-C(=O)-O-CH2-CH3.
(a)[1]

On Fig. 6.1, draw a circle around every atom that forms the ester linkage.

(b)[1]

Name compound E in the structure.

(c)[1]

Deduce the empirical formula of compound E from its composition.

(d(i))[2]

Name the two compounds that combine to produce compound E.

(d(ii))[1]

Suggest a catalyst that would be suitable for this reaction.

(e)[1]

Determine how many unbranched esters have the molecular formula C5H10O2.

(f)[1]

Write a symbol equation for the complete combustion of C5H10O2.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: ester link circled correctly (with 2 C atoms and 2 O atoms included)

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