WorksheetsiGCSE Alcohols
Total questions: 10
Worksheet time: 6mins
The catalyst in the production of ethanol from ethene and steam is
potassium dichromate (VI)
phosphoric acid
enzymes in yeast
dilute sulfuric acid
The optimum temperature for the fermentation of glucose to produce ethanol is
50C
15C
30C
100C
An advantage of producing ethanol by fermentation rather than hydration of ethene is that you use lower temperature and pressure, so (a) energy is needed.
Fermentation needs to be anaerobic or else the following would be formed instead of ethanol:
water and carbon dioxide
hydrogen and carbon dioxide
water and oxygen
carbon dioxide
Ethanol is made by reacting ethene with steam in the presence of a phosphoric acid catalyst.
Which row gives the correct conditions of temperature and pressure for this reaction?
Temp: 35C
Pressure: 300 atmospheres
Temp: 65C
Pressure: 300 atmospheres
Temp: 300C
Pressure: 65 atmospheres
Temp: 300C
Pressure: 35 atmospheres
The functional group for carboxylic acids is:
H+
C-C
-OH
-COOH
Ethanol can be manufactured by the fermentation of a solution of glucose.
Complete the word equation for this reaction.
glucose --> ethanol + ______ _______
(a)
What are the two conditions required for the fermentation of glucose to produce ethanol?
room temperature
1 atmosphere
30C
absence of air
300C
65 atmospheres
65C
yeast
Ethanol can be oxidised to produce a carboxylic acid.
Give the names of the two reagents used in this oxidation reaction.
glucose
yeast
alkane
chlorine
potassium dichromate (VI)
dilute sulfuric acid
ethene
steam
Ethanol can be oxidised to produce a carboxylic acid using acidified potassium dichromate (VI).
This is the colour change for the reaction:
green to orange
orange to green
orange to colourless
colourless to orange
