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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 yo... 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.
Answer
The correct option for the conditions used for fermentation is B: add yeast, temperature of about 35°C. Yeast is essential for fermentation, and a temperature around 35°C is optimal for the process, enabling the yeast to effectively convert sugars into ethanol.
Step 2
Step 3
Describe what is meant by an homologous series.
Answer
A homologous series is a group of organic compounds that share a common functional group and exhibit a gradual change in physical properties as the number of carbon atoms increases. Members of a homologous series have similar chemical properties due to the presence of the same functional group, but they differ in their molecular size and structural formula. For example, in the alcohols, each member differs by a -CH₂- unit in its carbon chain.