Chemistry · Oct / Nov 2025 · Paper 11 · Question 36

The structures of X and Y are shown. [structures: X = HO-C(=O)-(CH2)4-C(=O)-OH, Y = H2N-(CH2)6-NH2] What is the structure of the polymer formed when X and Y react together?

1. A-C(=O)-(CH2)4-C(=O)-N(H)-(CH2)6-N(H)-
2. B-C(=O)-(CH2)4-N(H)-C(=O)-(CH2)6-N(H)-
3. C-C(=O)-(CH2)6-C(=O)-N(H)-(CH2)4-N(H)-
4. D-C(=O)-(CH2)6-N(H)-C(=O)-(CH2)4-N(H)-

As printed in the paper