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  1. S

    2015 chem answers?

    In the syllabus HFCs are the 'official' replacement for CFCs, and hydrocarbons tend to have more of an environmental impact, which is what the question asked
  2. S

    2015 chem answers?

    I got 1. B 2. D 3. B 4. C 5. A 6. B 7. B 8. C 9. C 10. A 11. D 12.A 13. B 14. D 15. A 16. C 17. D 18. A 19. C 20. D
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