Consider hydrocarbons A, B, C and D and answer the questions that follow - Leaving Cert Chemistry - Question 6 - 2019
Question 6
Consider hydrocarbons A, B, C and D and answer the questions that follow.
a) To which homologous series do both A and C belong? (5)
b) Give the systematic IUPAC na... show full transcript
Worked Solution & Example Answer:Consider hydrocarbons A, B, C and D and answer the questions that follow - Leaving Cert Chemistry - Question 6 - 2019
Step 1
To which homologous series do both A and C belong?
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Answer
Both hydrocarbons A and C belong to the alkane series. Alkanes are saturated hydrocarbons characterized by the general formula C_nH_{2n+2}. This means for each n (number of carbon atoms), there are 2n + 2 hydrogen atoms present.
Step 2
Give the systematic IUPAC names for A, B, C and D.
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Answer
The systematic IUPAC names for the hydrocarbons are as follows:
A: Methane (C₁H₄)
B: Ethene (C₂H₄)
C: Butane (C₄H₁₀)
D: Benzene (C₆H₆)
Step 3
What do the letters LPG stand for?
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LPG stands for Liquefied Petroleum Gas. It is a flammable mixture of hydrocarbon gases, primarily propane and butane, stored in liquid form under pressure.
Step 4
Which one of the compounds listed above is a major component of LPG?
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Answer
The major component of LPG is Butane (C₄H₁₀).
Step 5
What is the main component of LPG?
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The main component of LPG is Propane (C₃H₈). In many LPG sources, a mixture of propane and butane is commonly used, but propane is typically the primary component.
Step 6
Which of the compounds A, B, C or D is produced in resin dumps and slurry pits, is carcinogenic?
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Answer
The compound that is produced in resin dumps and slurry pits and is known to be carcinogenic is Compound D, which is Benzene (C₆H₆).
Step 7
Indicate on your diagram the location of the ethanol, the Al2O3, and the heat source, during the preparation.
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Answer
In the provided diagram:
The ethanol is indicated at the ethanol end of the test tube.
The Al2O3 is located in the middle of the test tube.
The heat source is applied at the heat middle of the test tube during the preparation.
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