CourseCourseConceptConceptDocumentDocument

CAIE A-Level Chemistry AS 14.2.3 Of Aq Bromine to Show the Presence of a C C Questions

Practise the CAIE 9701 bromine-water test: reagent conditions, decolourisation observations and what they show about C=C bonds.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • use aqueous bromine at room temperature to test for alkene unsaturation
  • identify decolourisation of orange/brown bromine water to colourless as addition across C=C
  • distinguish an alkene from an alkane using the bromine-water observation and explain its limitation

CAIE A-Level Chemistry AS 14.2.3 Of Aq Bromine to Show the Presence of a C C Questions question 1

[Maximum number: 1]

Which compound will decolourise Br2(aq)\mathrm{Br}_{2}(\mathrm{aq}) ?

A

CH3CH2CH2CH2CH2CO2H\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CO}_{2} \mathrm{H}

B

CH3CH2CH2CH2CH2CHO\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CHO}

C

CH3CHCHCH2CH2CH2OH\mathrm{CH}_{3} \mathrm{CHCHCH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}

D

CH3CH2CH2CO2CH2CH3\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CO}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}

All question bank results loaded