Indian Forest Service (Mains), Chemistry optional · 2023 · Paper II

Q8(d). Average repeat-unit mass of a terpolymer

5 marks
Topic: Physical chemistry of polymers
Question only

Question

A, B and C repeat units weigh 104, 184 and 128. The composition is A₃.₅₅B₂.₂₀C₁.₀₀. Find the average unit weight.

Model answer

The free solution for 2023 answers questions 1, 2, 5, 6 and 7, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.

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Topic notes: polymers: polymerisation, Ziegler–Natta and molar mass, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversterpolymeraverage repeat-unit masscopolymer compositionpolymer molecular weight

All parts of Question 8

8(a) Selective epoxidation and carbonyl rearrangement10 marks
8(b) A C9H12 alkylbenzene mass spectrum5 marks
8(c) Benzene radical anion5 marks
8(d) Average repeat-unit mass of a terpolymer5 marks
8(e) Identification of glutaric anhydride15 marks