Chemistry · May / June 2024 · Paper 42 · Question 6
0620
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Glucose is involved in two processes.
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6(a)(i)[1]
photosynthesis
6(a)(ii)[1]
6CO2 + 6H2O → C6H12O6 + 6O2
6(a)(iii)[2]
M1 energy from light
M2 presence of chlorophyll
6(b)(i)[1]
fermentation
6(b)(ii)[1]
carbon dioxide
6(c)(i)[3]
M1 300 °C
M2 60 atm or 6000 kPa
M3 acid
6(c)(ii)[1]
only one product is formed
6(c)(iii)[3]
M1 C–C bond as dot and cross and C–O as ‘cross and dot’
M2 all C–H bonds and O–H bond as dot and cross
M3 4 non-bonding dot electrons on O atom and no other non-bonding electrons on C or H
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