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Exam Qs >>> A LEVEL CHEMISTRY OCR A PAPER 3 Questions And Answers 2025/2026
A LEVEL CHEMISTRY OCR A PAPER 3
A LEVEL CHEMISTRY OCR A PAPER 3
Q1 >>> Within the permafrost in Arctic regions of the Earth, large amounts of methane are trapped within ice as 'methane hydrate', CH4•xH2O. Methane makes up about 13.4% of the mass of 'methane hydrate'. Scientists are concerned that global warming will melt the permafrost, releasing large quantities of methane into the atmosphere. The H-O-H bond angle in ice is about 109° but about 105° in gaseous H2O. Explain why there is this difference [3 marks] - CORRECT ANSWER-T...
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