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CAIE A-Level Chemistry 13.1 Formulae, Functional Groups and Nomenclature

Practise recognising functional groups, switching between organic formula styles and applying systematic names.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • identify the functional group that controls the characteristic reactions of an organic compound
  • translate among molecular, structural, displayed and skeletal formulae without changing connectivity
  • choose the principal functional group, number the carbon chain and construct a systematic name

Covered syllabus points

13.1.1—Terms: hydrocarbon as a compound made up of C13.1.2—Alkanes are simple hydrocarbons with no13.1.3—Compounds in the table on pages 29 and 3013.1.4—Interpret/use the general, structural,13.1.5—Systematic nomenclature of simple aliphatic13.1.6—The molecular and/or empirical formula

13.1 Formulas, functional groups and nomenclature question 1

[Maximum number: 1]

Naphtha is a mixture which contains only hydrocarbon molecules.

What is meant by the term hydrocarbon?

13.1 Formulas, functional groups and nomenclature question 2

[Maximum number: 1]

The formulae of three compounds are shown.

C3H7CHOC2H5COCH3CH2CHCH2CH2OH\mathrm{C}_{3} \mathrm{H}_{7} \mathrm{CHO} \quad \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3} \quad \mathrm{CH}_{2} \mathrm{CHCH}_{2} \mathrm{CH}_{2} \mathrm{OH}

Only one of these compounds will decolourise bromine water. Only one of these compounds will produce a silver mirror with Tollens' reagent.

Which row shows the correct results?

decolourises bromine water

forms a silver mirror with Tollens' reagent

C3H7CHO\mathrm{C}_{3} \mathrm{H}_{7} \mathrm{CHO}

C2H5COCH3\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}

C2H5COCH3\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}

C3H7CHO\mathrm{C}_{3} \mathrm{H}_{7} \mathrm{CHO}

CH2CHCH2CH2OH\mathrm{CH}_{2} \mathrm{CHCH}_{2} \mathrm{CH}_{2} \mathrm{OH}

C2H5COCH3\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{COCH}_{3}

CH2CHCH2CH2OH\mathrm{CH}_{2} \mathrm{CHCH}_{2} \mathrm{CH}_{2} \mathrm{OH}

C3H7CHO\mathrm{C}_{3} \mathrm{H}_{7} \mathrm{CHO}

13.1 Formulas, functional groups and nomenclature question 3

[Maximum number: 2]

Compounds P, Q and R have all been found in the atmosphere of one of Saturn's moons.
P

Figure for Question 13.1 Formulas, functional groups and nomenclature question 3 — CAIE A-Level Chemistry AS
Q

Q

R

R

Question (a)

(a)

The flow chart shows some reactions of R.

R

Figure for Question (a) — CAIE A-Level Chemistry AS
Figure for Question (a) — CAIE A-Level Chemistry AS
CH3CH2CH2NH2\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NH}_{2}
[ 2 ]

Question (i)

(i)

Draw the structure of S, the organic product of reaction 2 .

[ 1 ]

Question (ii)

(ii)

Name T.

[ 1 ]
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