Official June 2024 AQA AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Merged Question Paper + Mark Scheme + Insert (68pages)
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Section A box
Answer all questions in this section.
0 1 This question is about the analysis of organic compounds.
0 1 . 1 Table 1 shows the results of chemical tests on three organic compounds.
Complete the empty boxes in the table.
Table 1
Chemical test
Add bromine
water
orange to
colourless no visible change
no visible change bubbles of gas no visible change
Warm with
Fehling’s
solution
no visible change no visible change
[3 marks]
3
*03*
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IB/M/Jun24/7404/2
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outside the
box 0 1 . 2 0.500 g of a hydrocarbon is analysed.
The hydrocarbon contains 0.450 g of carbon.
Calculate the empirical formula of this hydrocarbon.
[3 marks]
Empirical formula
Turn over for the next question
6
4
*04*
IB/M/Jun24/7404/2
Do not write
outside the
box 0 2 This question is about infrared spectroscopy.
0 2 . 1 Compounds A and B both have the molecular formula C4H8O2
Figure 1 shows the infrared spectra of compounds A and B.
Use the infrared spectra to deduce a possible structural formula for compound A and
a possible structural formula for compound B.
[2 marks]
Figure 1
Possible structural formula of A Possible structural formula of B
5
*05*
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box 0 2 . 2 Figure 2 shows the infrared spectrum of either pent-1-ene or 2-methylbut-2-ene.
Figure 2
Outline how to use the infrared spectrum to determine whether the compound is
pent-1-ene or 2-methylbut-2-ene.
[2 marks]
Question 2 continues on the next page
6
*06*
IB/M/Jun24/7404/2
Do not write
outside the
box 0 2 . 3 Figure 3 shows the infrared spectrum of methane.
Figure 3
Use information from Figure 3 to explain why methane acts as a greenhouse gas.
[1 mark]
5
7
*07*
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IB/M/Jun24/7404/2
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DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
8
*08*
IB/M/Jun24/7404/2
Do not write
outside the
box 0 3 This question is about CFCl3
CFCl3 used to be the propellant in most aerosol cans.
0 3 . 1 Use IUPAC rules to name CFCl3
[1 mark]
0 3 . 2 Give an equation for each of the two propagation steps in the conversion of
CHFCl2 into CFCl3
[2 marks]
Equation 1
Equation 2
0 3 . 3 In the presence of ultraviolet radiation, CFCl3 breaks down in the upper atmosphere to
form chlorine free radicals.
Give an equation for this reaction
jordancarter 6 months ago
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