A is present in wines, beers and spirits - Leaving Cert Chemistry - Question 8 - 2020
Question 8
A is present in wines, beers and spirits.
The first step in the metabolism of A in the body produces B.
Bacteria in wine use enzymes to change B to C giving wine l... show full transcript
Worked Solution & Example Answer:A is present in wines, beers and spirits - Leaving Cert Chemistry - Question 8 - 2020
Step 1
Give the IUPAC names for A, B and C.
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Answer
A: ethanol
B: ethanal
C: ethanoic acid
Step 2
Which two compounds in the table are alcohols?
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Answer
A: ethanol
E: benzyl alcohol
Step 3
Is soluble in water?
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Answer
E: benzyl alcohol is soluble.
Other compounds, like D: ethene, are insoluble.
Step 4
Which compound in the table is used to make polyethene?
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Answer
D: ethene
Step 5
Identify an aromatic compound in the table.
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Answer
E: benzyl alcohol
Step 6
What is an enzyme?
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An enzyme is a biological catalyst that speeds up reactions in living organisms by lowering the activation energy.
Step 7
Supply the missing word in the following statement.
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Answer
oxidation
Step 8
Draw a labelled diagram of the arrangement of apparatus to carry out this reaction and collect D.
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Answer
The diagram should include:
A test tube (slightly slanting upwards)
Delivery tube leading to the water collection
Glass wool soaked in ethanol (A)
Aluminum oxide (Al2O3) as the catalyst
Bunsen burner as the heat source
Step 9
Classify the conversion of A to D as an elimination, an addition or a substitution reaction.
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Answer
This conversion is classified as an elimination reaction.
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