Which functional group is present in all alcohols?
–COOH
–OH
–C=C–
What is the name of the alcohol which has three carbon atoms in each molecule?
Methanol
Ethanol
Propanol
What is the word equation for the production of ethanol by fermentation?
glucose → ethanol + carbon dioxide
glucose + oxygen → carbon dioxide + water
glucose → ethanol + oxygen
Why does Brazil use a lot of bioethanol as fuel?
Brazil grows a lot of sugar cane, which means that Brazil can produce its own fuel
Brazil cannot afford to buy crude oil and produce fuels like petrol
Brazil has very strict environmental legislation in place
When ethanol is exposed to air, what product does it become?
Ethanoic acid
Propanoic acid
What chemical is used to test the presence of an alcohol group?
Acidified potassium dichromate(VI)
Bromine water
Limewater
Ethanol is used as a biofuel. What is the symbol equation for the complete combustion of ethanol?
2C2H6 + 7O2 → 4CO2 + 6H2O
C2H5OH + 3O2 → 2CO2 + 3H2O
C2H5OH + 2O2 → 2CO + 3H2O
Which structure represents ethanol?
A
B
C
An alcohol and an alkene are passed through an infrared spectrometer. At what wavenumber does a peak arise with the alcohol only?
3,400 cm–1
2,800 cm–1
1,650 cm–1
During fermentation, at what temperature is sugar (glucose) from plant material converted into ethanol and carbon dioxide?
Temperature of 40–60°C
Temperature of 60–80°C
Temperature of 20–40°C