Chemistry · May / June 2020 · Paper 42 · Question 6
0620
As printed in the paper
Show the answer and mark scheme
6(a)(i)[1]
substitution
6(a)(ii)[1]
ultraviolet light / ultraviolet radiation
6(a)(iii)[2]
The answer is a drawing: see the picture of this mark scheme row.
6(b)(i)[1]
only one product / double bond becomes single bond / two molecules join (to make one molecule)
6(b)(ii)[3]
(energy required to break bonds =) 854 (1)
(energy given out when bonds form =) 1025 (1)
overall energy change 854 – 1025 = –171 (1)
6(c)(i)[3]
alkene (1)
alcohols / alkanols (1)
carboxylic acids/alkanoic acids (1)
6(c)(ii)[2]
turns colourless / decolourised (1)
bubbles / fizzing / effervescence (1)
6(d)(i)[2]
COOH
CH2OH
C
C
H
H
C–C (1)
each C bonded to –CH2OH / –COOH and H with no other atoms + extension bonds (1)
6(d)(ii)[1]
polyester
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