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CAIE A-Level Chemistry AS 19 Nitrogen Compounds Questions

Practise preparing amines and nitriles, forming hydroxynitriles and hydrolysing nitriles to carboxylic acids.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Covered syllabus points

19.1 Primary amines19.2 Nitriles and hydroxynitriles

Question 1

[Maximum number: 1]

The structure of coniine is shown.

Figure for Question 1 — CAIE A-Level Chemistry AS

Coniine can be synthesised by reacting ammonia with a dibromo compound, X .

XNH3+C8H16Br2→ coniine +2HBr\begin{gathered} \mathrm{X} \\ \mathrm{NH}_{3}+\mathrm{C}_{8} \mathrm{H}_{16} \mathrm{Br}_{2} \rightarrow \text { coniine }+2 \mathrm{HBr} \end{gathered}

What is compound X ?

A

1,1-dibromo-2-propylcyclopentane

B

1,2-dibromo-2-propylcyclopentane

C

Br(CH2)3CHBr(CH2)3CH3\mathrm{Br}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{CHBr}\left(\mathrm{CH}_{2}\right)_{3} \mathrm{CH}_{3}

D

Br(CH2)4CHBr(CH2)2CH3\mathrm{Br}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{CHBr}\left(\mathrm{CH}_{2}\right)_{2} \mathrm{CH}_{3}

Question 2

[Maximum number: 1]

Chloroethane can be used to make sodium propanoate.

 chloroethane → intermediate Q→ sodium propanoate \text { chloroethane → intermediate } \mathrm{Q} \rightarrow \text { sodium propanoate }

Intermediate Q is hydrolysed with boiling aqueous NaOH to give sodium propanoate.
Which reagent would produce intermediate Q from chloroethane?

A

concentrated ammonia solution

B

dilute sulfuric acid

C

hydrogen cyanide in water

D

potassium cyanide in ethanol

Question 3

[Maximum number: 1]

The product of the reaction between propanone and hydrogen cyanide is hydrolysed under acidic conditions.

What is the formula of the final product?

A

CH3CH(OH)COOH\mathrm{CH}_{3} \mathrm{CH}(\mathrm{OH}) \mathrm{COOH}

B

CH3CH2CH2COOH\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{COOH}

C

(CH3)2CHCONH2\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCONH}_{2}

D

(CH3)2C(OH)COOH\left(\mathrm{CH}_{3}\right)_{2} \mathrm{C}(\mathrm{OH}) \mathrm{COOH}

Question 4

[Maximum number: 1]

The structure of coniine is shown.

Figure for Question 4 — CAIE A-Level Chemistry AS

Coniine can be synthesised by reacting ammonia with a dibromo compound, X .

NH3+C8H16Br2→ coniine +2HBrX\begin{gathered} \mathrm{NH}_{3}+\mathrm{C}_{8} \mathrm{H}_{16} \mathrm{Br}_{2} \rightarrow \text { coniine }+2 \mathrm{HBr} \\ \mathrm{X} \end{gathered}

What is the name of compound X ?

A

1,1-dibromo-2-propylcyclopentane

B

1,2-dibromo-2-propylcyclopentane

C

1,4-dibromooctane

D

1,5-dibromooctane

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