Chemistry · May / June 2022 · Paper 42 · Question 5
0620
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The question as text
The reaction scheme shows five organic reactions, numbered 1 to 5. carbon dioxide + water ethanol sugar alkene A alkane B compound C 2 5 1 3 4
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5(a)[1]
fermentation
5(b)[3]
(complete) combustion
C2H5OH + 3O2 → 3H2O + 2CO2
reactant species
fully correct equation
5(c)(i)[1]
ethene
5(c)(ii)[1]
addition
5(c)(iii)[2]
steam
catalyst + 60 atm or catalyst + 300 °C
5(d)(i)[3]
hydrogen
catalyst
high temperature
5(d)(ii)[1]
CnH2n+2
5(e)(i)[1]
potassium manganate(VII)
5(e)(ii)[1]
carboxylic acids
5(e)(iii)[1]
fully displayed formula of ethanoic acid
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