Ethanol is present in alcoholic drinks - Edexcel - GCSE Chemistry - Question 1 - 2014 - Paper 1
Question 1
Ethanol is present in alcoholic drinks.
(a) Ethanol is produced by fermentation of carbohydrates.
Complete the sentence by putting a cross (✗) in the box next to y... show full transcript
Worked Solution & Example Answer:Ethanol is present in alcoholic drinks - Edexcel - GCSE Chemistry - Question 1 - 2014 - Paper 1
Step 1
Complete the sentence by putting a cross (✗) in the box next to your answer.
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Answer
The correct answer is B: add yeast, temperature of about 35°C. Yeast is essential for the fermentation process, and this temperature is optimal for yeast activity.
Step 2
Write the balanced equation for this reaction.
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Answer
The balanced equation for the production of ethanol from ethene and steam is:
C2H4(g)+H2O(g)→C2H5OH(l)
Step 3
Describe what is meant by an homologous series.
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Answer
A homologous series is a group of organic compounds that share a common functional group and have similar chemical properties. The members of a homologous series differ from each other by a constant unit, typically a -CH₂- group, resulting in a gradual change in physical properties such as boiling points and solubility.
