Neco Model Questions Vol1 2023 Chemistry Question 33
Practice objective / multiple choice question 33 from the 2023 Neco Model Questions Vol1 Chemistry examination.
A polymer sample has an initial number‑average molecular weight \(M_{n0}=2.0 \times 10^{5}\ \mathrm{g\ mol^{-1}}\). It undergoes random chain scission that follows first‑order kinetics with respect to the number of bonds. The half‑life for the decrease in \(M_n\) is 30 days. After how many days will the polymer reach \(M_n = 5.0 \times 10^{4}\ \mathrm{g\ mol^{-1}}\)?
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About This Question
This is Neco Model Questions Vol1 2023 Chemistry Question 33. It is one of the objective questions from the 2023 Neco Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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