Question
Which statements about ethanol are correct?
1 Ethanol is used as a solvent.
2 Ethanol can be made directly from ethane.
3 Ethanol is a covalent compound.
A. 1 only B. 1 and 2 C. 1 and 3 D. 2 and 3
Answer/Explanation
Ans:
C
Question
The reaction of ethanol with acidified potassium manganate(VII) is shown.
\(CH_{3}CH_{2}OH\xrightarrow[H^{+}]{KMnO_{4}}CH_{3}COOH\)
Which type of reaction is taking place?
- addition
- condensation
- hydrolysis
- oxidation
Answer/Explanation
Ans:
D
Question
Ethanol is made industrially by the fermentation of glucose or by the catalytic addition of steam to ethene.
Which statement describes an advantage of fermentation compared to catalytic addition?
- Ethanol is the only product of fermentation.
- Fermentation uses a batch process but catalytic addition is continuous.
- Fermentation uses a higher temperature than catalytic addition.
- Fermentation uses a renewable resource.
Answer/Explanation
Ans:
D
Question
Fermentation of sugar produces a mixture of ethanol solution and solid yeast. How is the solid yeast removed from the mixture?
A. crystallisation
B. distillation
C. filtration
D. fractional distillation
Answer/Explanation
Ans:
C