IGCSE CHEMISTRY – Organic chemistry – Alcohols & Carboxylic acids
DATE: 15/03/2025
1. Ethanol is a member of a homologous series.
a) i State the homologous series to which ethanol belongs?...............................[1]
ii Give the general formula for the series?.......................................................[1]
iii Define the term functional group mean?......................................................[1]
iv Give the functional group for ethanol’s homologous series?........................[1]
b) Write down the formula of ethanol………………………………………………..[1]
c) i Draw the structural formula for the fifth member of the series, pentan-1-ol. [1]
ii Draw the structural formula for an isomer of pentan-1-ol…………………….[1]
iii Describe how pent-1-ene could be made from pentan-1-ol…………………[2]
iv Name the organic product formed when pentan-1-ol is oxidised using
acidified potassium manganate(VII)………………………………………………….[1]
2. a Name the carboxylic acids and alcohols one would use to make the following
esters?
(i) butyl methanoate
(ii) ethyl methanoate………………………………………………………………[2]
b List names of the esters that would be made using the following carboxylic acids
and alcohols?
(i)
ethanoic acid and butan-1-ol
(ii)
methanoic acid and methanol……………………………………………...[2]
c Draw the structures of the following esters:
(i) ethyl methanoate
(ii) propyl ethanoate………………………………………………………………...[4]
[Total: 18 Marks]