2.1 Write down the …
2.1.1 general formula for the homologous series to which compound B belongs - NSC Physical Sciences - Question 2 - 2016 - Paper 2
Question 2
2.1 Write down the …
2.1.1 general formula for the homologous series to which compound B belongs.
2.1.2 name of the homologous series to which compound D belongs.
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Worked Solution & Example Answer:2.1 Write down the …
2.1.1 general formula for the homologous series to which compound B belongs - NSC Physical Sciences - Question 2 - 2016 - Paper 2
Step 1
2.1.1 general formula for the homologous series to which compound B belongs.
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Answer
The general formula for the homologous series to which ethene (compound B) belongs is CnH2n, where n is the number of carbon atoms in the molecule.
Step 2
2.1.2 name of the homologous series to which compound D belongs.
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Answer
Compound D, which is an ester, belongs to the homologous series of carboxylic acids.
Step 3
2.1.3 letter of the compound that represents an aldehyde.
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The letter representing an aldehyde in the provided compounds is E, which corresponds to Methanal.
Step 4
2.2.1 Give a reason why compound B is classified as unsaturated.
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Compound B (Ethene) is classified as unsaturated because it contains a carbon-carbon double bond, which allows it to react with additional atoms or groups during chemical reactions.
Step 5
2.2.2 Classify the polymerisation as ADDITION or CONDENSATION.
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The polymerisation process of compound B is classified as ADDITION polymerisation since it involves the merging of monomer units without the loss of any molecule (such as water).
Step 6
2.2.3 Write down the CONDENSED STRUCTURAL FORMULA of the polymer.
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The condensed structural formula for the polymer formed from compound B is (C2H4)n, where 'n' represents the number of repeating units in the polymer chain.
Step 7
2.3.1 IUPAC name of compound C.
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The IUPAC name of compound C (2-bromo-4-methylhexane) is 2-bromo-4-methylhexane.
Step 8
2.3.2 IUPAC name of compound D.
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The IUPAC name of compound D (propyl propanoate) is propyl propanoate.
Step 9
2.4.1 STRUCTURAL FORMULA of compound F.
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The structural formula of compound F (C4H10O) can be represented as:
H H H
| | |
H--C--C--C--OH
| | |
H H H
Step 10
2.4.2 IUPAC NAME of a CHAIN ISOMER of compound F.
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A chain isomer of compound F can be named 2-butanol.
Step 11
2.5.1 IUPAC NAME of the carboxylic acid used.
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The IUPAC name of the carboxylic acid used is Propanoic acid.
Step 12
2.5.2 STRUCTURAL FORMULA of compound A.
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The structural formula of compound A (Propyl propanoate) can be represented as:
O H
|| |
HO-C--C--C
| | |
H H H
Step 13
2.6.1 Write down the MOLECULAR FORMULA of the product.
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Answer
The molecular formula of the product when compound B (Ethene) reacts with bromine (Br₂) is C2H4Br2.
Step 14
2.6.2 Use a calculation to determine the percentage composition of the product.
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To find the percentage composition of the product C2H4Br2:
