11.3. Fuels
A subsection of Chemistry, 0620, through 11. Organic chemistry
Listing 10 of 283 questions
Use Coal gas is made by heating coal in the absence of air. The table shows the composition of coal gas. name of gas % of gas in coal gas hydrogen methane carbon monoxide carbon dioxide nitrogen ethene oxygen Which element in this table is a highly flammable gas? Which compound in the table is an alkene? Which compound in the table turns limewater milky? Describe a test you can use to distinguish between ethene and methane. test result with ethene result with methane Examiner's Use Molecules of ethene can react with each other to make poly. What is the name given to this type of reaction? Which formula below best represents a molecule of poly? Tick one box. C C H H H H n C C H H H CH3 n C C H H n C C H H H H Ethene can be manufactured by breaking down hydrocarbons into smaller molecules using high temperatures and a catalyst. State the name given to this type of reaction. A liquid is also formed when coal is heated in the absence of air. This liquid contains a high percentage of ammonia. Describe a test for ammonia. test result Ammonia has the formula NH3. Calculate the relative molecular mass of ammonia. Coal contains a small amount of sulphur. Explain why burning coal is harmful to the environment.
0620_s06_qp_2
THEORY
2006
Paper 2, Variant 0
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For Examiner's Use A major source of energy is the combustion of fossil fuels. Name a solid fossil fuel. Name a gaseous fossil fuel. Petroleum is separated into more useful fractions by fractional distillation. Name two liquid fuels obtained from petroleum. and Name two other useful products obtained from petroleum that are not used as fuels. and Give another mixture of liquids that is separated on an industrial scale by fractional distillation.
0620_s07_qp_3
THEORY
2007
Paper 3, Variant 0
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Questions Discovered
283