Chemistry — A-Level

Primary Amines — Multiple-Choice Questions (Cambridge International A-Level Chemistry): Exam Questions

9 questions · 9 marks · ≈ 9 min

Guided practice

11 markeasy

What is the displayed formula of ethylamine?

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21 markeasy

Which type of reaction is used to synthesise ethylamine from bromoethane?

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Electrophilic substitution

Nucleophilic substitution

Oxidation

Reduction

31 markeasy

Bromoethane reacts with reagent X. Which row correctly identifies reagent X and the organic product formed?

	X	Product
A	Excess ethanolic ammonia	Primary amine
B	Methanol	Ether
C	Methylamine	Secondary amine
D	Water	Alcohol

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41 markmedium

Iodomethane is heated under pressure with ethanolic ammonia. The ammonia is not in excess. Which organic compounds are formed in the reaction mixture?

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A mixture of methylamine, dimethylamine and trimethylamine

Dimethylamine only

Methylamine and dimethylamine only

Methylamine only

51 markmedium

1-chloropropane can be used to make propylamine.

Which row shows the correct reagent and type of reaction?

	Reagent	Type of reaction
A	Aqueous ammonia	Electrophilic addition
B	Aqueous ammonia	Nucleophilic substitution
C	Ethanolic ammonia	Electrophilic addition
D	Ethanolic ammonia	Nucleophilic substitution

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61 markmedium

Chloroethane is heated under pressure with an excess of ethanolic ammonia.

Which compound is the main organic product?

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CH₃CH₂NH₂

(CH₃CH₂)₂NH

(CH₃CH₂)₃N

(CH₃CH₂)₄N⁺Cl^-

71 markhard

Which row correctly identifies the reagents and conditions for the two reactions shown?

	(CH₃)₂CO $\rightarrow$ (CH₃)₂CHCN	CH₃CHClCH₃ $\rightarrow$ CH₃CH(NH₂)CH₃
A	Ethanolic KCN, heat	Aqueous NH₃, heat
B	Ethanolic KCN, heat	Excess ethanolic NH₃, heat under pressure
C	KCN and dilute H₂SO₄	Aqueous NH₃, heat
D	KCN and dilute H₂SO₄	Excess ethanolic NH₃, heat under pressure

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81 markhard

Which amine can not be produced by the reduction of a nitrile?

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91 markhard

What is the systematic name of the compound shown?

Structural formula of a quaternary ammonium chloride salt showing nitrogen bonded to two methyl groups and two ethyl groups with a positive charge, paired with a chloride anion

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diethyldimethylammonium chloride

diethylmethylammonium chloride

dimethyldiethylammonium chloride

ethylmethylammonium chloride

Product

Excess ethanolic ammonia

Primary amine

Methanol

Ether

Methylamine

Secondary amine

Water

Alcohol

Reagent

Type of reaction

Aqueous ammonia

Electrophilic addition

Aqueous ammonia

Nucleophilic substitution

Ethanolic ammonia

Electrophilic addition

Ethanolic ammonia

Nucleophilic substitution

(CH₃)₂CO

\rightarrow

(CH₃)₂CHCN

CH₃CHClCH₃

\rightarrow

CH₃CH(NH₂)CH₃

Ethanolic KCN, heat

Aqueous NH₃, heat

Ethanolic KCN, heat

Excess ethanolic NH₃, heat under pressure

KCN and dilute H₂SO₄

Aqueous NH₃, heat

KCN and dilute H₂SO₄

Excess ethanolic NH₃, heat under pressure