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This quiz contains 12 questions from a mix of 1 subtopics.
What are the typical reaction conditions for the industrial hydration of ethene?
300°C and 60 atm
30-40°C and anaerobic conditions
500°C and 100 atm
100°C and 1 atm
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Which of the following is the correct equation for the fermentation of glucose to produce ethanol?
C6H12O6 ➔ 2C2H5OH + 2CO2
2C2H5OH + 2CO2âž” C6H12O6
C6H12O6 + 6O2 ➔ 6CO2 + 6H2O
C2H4 + H2O ➔ C2H5OH
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Why are anaerobic conditions used in the fermentation of glucose to produce ethanol?
to promote the growth of yeast cells
to ensure yeast performs anaerobic respiration
to reduce the cost of the process
to increase the rate of the reaction
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What is the optimal temperature range for the fermentation of glucose by yeast?
70-80°C
50-60°C
30-40°C
10-20°C
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Which of the following is an advantage of using bioethanol as a fuel?
it has higher net CO2 emissions compared to fossil fuels
it is produced from crops that can be replanted and harvested repeatedly
it requires no engine modifications
it is non-renewable
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Which of the following is a disadvantage of using bioethanol as a fuel?
it has lower net CO2 emissions compared to fossil fuels
it is produced from non-biological materials
it is not renewable
it may require engine modifications for efficient use
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Which of the following processes absorbs CO2 from the atmosphere?
hydration of ethene
photosynthesis in plants
combustion of ethanol
fermentation of glucose
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Which of the following contributes to the carbon footprint of ethanol production through fermentation?
the water consumed during the hydration of ethene
the use of fossil fuels to produce fertilisers for the crops
the CO2 released during the fermentation process
the CO2 absorbed by plants during photosynthesis
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What is the primary reason why ethanol production through fermentation is not considered completely carbon neutral?
the CO2 absorbed by plants during photosynthesis
the water consumed during the hydration of ethene
the reliance on fossil fuels for various stages of the production process
the CO2 released during the fermentation process
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Which of the following is a byproduct of ethanol production through fermentation?
ethene
glucose
carbon dioxide
water
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What is the purpose of fractional distillation in the ethanol production process through fermentation?
to produce glucose from biological materials
to break down glucose into ethanol and carbon dioxide
to separate ethanol from the fermentation mixture
to convert ethene into ethanol
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What is the term for fuels derived from biological materials that were recently living?
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