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CAIE A-Level Chemistry AS 15 Halogen Compounds Questions

Practise halogen-compound reactions, mechanisms and conditions, from substitution and elimination to hydrolysis patterns in data.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Covered syllabus points

15.1 Halogenoalkanes

Question 1

[Maximum number: 1]

1,2-dibromopropane can be made from 1-bromopropane in two steps.
Which row is correct?

step 1

step 2

addition

substitution

elimination

addition

hydrolysis

elimination

substitution

hydrolysis

Question 2

[Maximum number: 1]

Which row shows the correct name and classification of the halogenoalkane shown?

CH3(CH2)2CBr(CH3)CH2CH3\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{2} \mathrm{CBr}\left(\mathrm{CH}_{3}\right) \mathrm{CH}_{2} \mathrm{CH}_{3}

name

classification of halogenoalkane

3-bromo-3-methylhexane

secondary

3-bromo-3-methylhexane

tertiary

3-bromo-4-methylhexane

tertiary

4-bromo-5-methylhexane

secondary

Question 3

[Maximum number: 1]

Compound X is treated with an excess of dilute aqueous potassium hydroxide.

Figure for Question 3 — CAIE A-Level Chemistry AS

What is the structure of the organic product?

A
Figure for Question 3 — CAIE A-Level Chemistry AS — Option A
B
Figure for Question 3 — CAIE A-Level Chemistry AS — Option B
C
Figure for Question 3 — CAIE A-Level Chemistry AS — Option C
Figure for Question 3 — CAIE A-Level Chemistry AS
D

Option D as shown in the official source

Question 4

[Maximum number: 1]

Structural isomerism and stereoisomerism should be considered when answering this question. 2-bromopentane is heated with an excess of ethanolic sodium hydroxide.

How many different hydrocarbons are produced?

A

1

B

2

C

3

D

4

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