Production of ethanol (Edexcel GCSE Chemistry): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What two products are formed when yeast ferments sugar?
What two products are formed when yeast ferments sugar?
Ethanol and carbon dioxide
What is the ideal temperature range for fermentation?
What is the ideal temperature range for fermentation?
to
What is the name of the enzyme in yeast that catalyses fermentation?
What is the name of the enzyme in yeast that catalyses fermentation?
Zymase
Why must fermentation occur in anaerobic conditions?
Why must fermentation occur in anaerobic conditions?
O₂ turns ethanol into ethanoic acid
At what ethanol concentration does fermentation stop?
At what ethanol concentration does fermentation stop?
10-20%
Why does fermentation stop at a certain alcohol concentration?
Why does fermentation stop at a certain alcohol concentration?
The alcohol kills the yeast
Which equation represents the fermentation of glucose?
Which equation represents the fermentation of glucose?
What is an advantage of producing ethanol by fermentation?
What is an advantage of producing ethanol by fermentation?
Sugar cane is a renewable resource
What is a disadvantage of fermentation for ethanol production?
What is a disadvantage of fermentation for ethanol production?
The ethanol produced is impure
What is the boiling point of ethanol?
What is the boiling point of ethanol?
Why does ethanol evaporate first during fractional distillation?
Why does ethanol evaporate first during fractional distillation?
It has a lower boiling point than water
What ethanol concentration is achieved after fractional distillation?
What ethanol concentration is achieved after fractional distillation?
Above 20%