Chemistry Revision 5.0 / 5 based on 2 ratings ? ScienceChemistryGCSEAQA Created by: plu10710Created on: 26-03-14 13:48 86247315109 Across 1. The most viscous hydrocarbons are likely to leave the fractionating column at... (3, 6) 4. What is the monomer is poly(ethene)? (6) 5. What is formed when ethene reacts with steam? (7) 8. Starting with the centre of the Earth, what is the correct order for the layers of the Earth? (4, 6, 5) 9. What is the most abundant gas in the atmosphere? (8) 10. Which gas is not formed by the combustion of a hydrocarbon (6) Down 2. What caused the proportion of oxygen, in the atmosphere, to increase? (14) 3. what is the correct chemical symbol for sodium? (2, 3, 1, 5, 1) 6. Incomplete combustion can produce black particles of what? (6) 7. What does biofuel come from? (5, 8)
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