Chemistry 0620 · IGCSE · Formulae, functional groups and terminology

Formulae, functional groups and terminology — practice question

(a(i))[1]

On Fig. 4.1, encircle the carboxylic acid functional group.

(a(ii))[1]

Deduce the molecular formula for compound B.

(a(iii))[1]

Explain why compound B is classed as unsaturated.

(a(iv))[2]

Describe a test used for an unsaturated compound, including both the reagent and the observation.

(b(i))[1]

State the kind of bonding found in an alkane molecule.

(b(ii))[1]

Ethane undergoes substitution with chlorine. Draw the displayed formula of the organic product formed in this reaction.

(b(iii))[1]

State what the term hydrocarbon means.

(c)[1]

Name the process used to separate petroleum into its useful fractions.

(d)[3]

Complete Table 4.1 by filling in the names and uses of some of the fractions in petroleum.

Worked solution & mark scheme

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

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