Uddingston Grammar School
Nat4/Nat5 Chemistry
Everyday Consumer Products: Homework 7
National 4
1. The grid contains the name of some chemical processes below.
A
Respiration
B
C
Fermentation Filtration
D
E
Photosynthesis Distillation
F
Cracking
a) Identify the process to separate alcohol and water.
b) Identify the process in which chlorophyll absorbs light energy.
c) Identify the two processes in which carbon dioxide is produced.
1KU
1KU
1KU
2. Flowers produce a sweet tasting liquid called nectar. Nectar contains a mixture
of sugars such as sucrose and fructose.
a) To which family of compounds to sucrose and fructose belong.
1KU
Glucose can be broken down to form alcohol in the presence of an enzyme.
b)
i.
ii.
iii.
What is the chemical name for the alcohol produced.
What is an enzyme?
Give another example of an enzyme and its use.
1KU
1KU
1PS
3. In the manufacture of malt vinegar, starch reacts with water to produce
glucose. Glucose is converted to carbon dioxide and ethanol using an
enzyme. Ethanol is oxidised, by bacteria, producing malt vinegar.
(a) Use the above information to complete the flow chart.
(b) The equation for one of the processes is:
2PS
C6H12O6  C2H50H + CO2
Balance this equation.
1PS
National 5
1. Sweets, such as pineapple cubes, contain the artificial flavouring methyl
butanoate.
a) To what family of compounds does methyl butanoate belong to?
1KU
Methyl butanoate can be broken down to form an alkanol and an alkanoic acid.
b) Name this type of reaction.
1KU
c) Draw the full structural formula for the alkanoic acid and the alcohol formed
from the breakdown of methyl butanoate.
2PS
2. Ethanoic acid is more commonly known as vinegar.
a) Draw the structure of ethanoic acid.
1KU
b) Ethanoic acid can be reacted with methanol to form an ester, which is used as a
solvent in nail varnish remover. Name this ester.
1PS
A
3. Which of the following is the structure of propyl ethanoate?
B
1PS
C
4. Industrial ethanol can be made from ethane by
A
B
C
D
Condensation
Dehydration
Hydrolysis
Hydration
1KU
5. A method of making ethyl ethanoate from ethanol only is shown below:
2C2H5OH

CH3COOC2H5
+
2X
(a) Name substance X.
(b) This method is used in countries where ethanol is made from a
renewable source. Name this source.
20 marks
1PS
1KU