Chemistry · May / June 2024 · Paper 41 · Question 7
0620
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Many organic compounds contain carbon and hydrogen only.
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7(a)(i)[3]
M1 C 82.76 / 12: H 17.24/1 (1)
OR evaluation i.e.
6.90:17.24
M2 fractions showing division of both by smaller ie 6.9 / 6.9 and 17.24 / 6.9
OR evaluation ie 1:2.5 OR 4:10
M3 C2H5 (1)
7(a)(ii)[1]
C5H10
7(b)[3]
M1
any C=C with both carbons having a valency of 4(1)
M2 correct displayed formula of (cis or trans) but–2–ene(1)
M3 but–2–ene
7(c)[1]
C8H16
7(d)(i)[1]
structural isomers
7(d)(ii)[2]
M1 ethanoic acid(1)
M2 methanol(1)
7(d)(iii)[2]
M1 Displayed formula of propanoic acid showing ALL atoms and bonds
(1)
M2 propanoic acid(1)
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