Gce Model Questions Vol1 2020 Chemistry Question 38
Practice objective / multiple choice question 38 from the 2020 Gce Model Questions Vol1 Chemistry examination.
A step‑growth polymerisation is carried out using two difunctional monomers, A (molar mass 100 g mol⁻¹) and B (molar mass 200 g mol⁻¹), in equimolar amounts. The conversion achieved is 90 %.\n\n(i) Calculate the number‑average degree of polymerisation (DPₙ).\n(ii) Determine the number‑average molecular weight (Mₙ) of the polymer formed.\n(iii) The polymer must have Mₙ greater than \(5\times10^{4}\) g mol⁻¹ to meet a specified tensile‑strength requirement. Does the polymer obtained at this conversion satisfy the requirement?
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This is Gce Model Questions Vol1 2020 Chemistry Question 38. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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