Chemistry · May / June 2021 · Paper 42 · Question 6
0620
As printed in the paper
The question as text
Molecules A and B can form condensation polymers. A HO OH B HOOC COOH
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
6(a)(i)[1]
carboxylic acid
6(a)(ii)[3]
any correct displayed ester link between any two blocks showing all atoms and all bonds (1)
correct orientation of three displayed inter-block ester links with correct orientation (1)
continuation bonds on polyester (1)
6(a)(iii)[1]
water
6(b)(i)[1]
two blocks linked by –O–
6(b)(ii)[2]
acid (and heat) (1)
enzymes (ignore names) (1)
6(b)(iii)[1]
chromatography
6(c)(i)[1]
fermentation
6(c)(ii)[2]
C6H12O6 → 2C2H5OH + 2CO2
C2H5OH (1)
rest of equation (1)
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.