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GCE O Level 2011 Oct/Nov Chemistry 5072 (MCQ) Paper 1 Suggested Answers & Solutions

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Another morning, another booklet, another series of codes sent:


Note: After staring long and hard at the ang moh anomaly that is Q22, I’ve decided to change its answer to A. Reason being that scrap steel, containing a higher percentage (98%) of iron, will lead to a better yield and reduce mining wastes when iron is produced from it via recycling. The highlighted portion would definitely qualify as a correct reason if only it had been included in the original statement – instead of sparking intense debates like this 🙁

Do they tally with yours?

Update: Once again, the list of workings and explanations for each of the answers (where applicable) have been compiled (along with the questions at the end)!

You may access here by clicking the Like button (if you haven’t yet done so).

GCE O Level 2011 Chemistry 5072 Paper 1 solutions

2011 O-Level October/November Chemistry 5072 Paper 1 Suggested Solutions

As usual, hopefully this will help in some way to settle some of the debates regarding some of the answers (and hopefully not create more in the process!)

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