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C1.4.1 & 1.4.2 Crude oil and Hydrocarbons

Using Exam pro items to support successful outcomes

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• Learners will be able to test their progress against learning outcomes using questions from past AQA GCSE examinations

• C1.3.2

Foundation C1 Jan 12, 3

1

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Mark scheme- Foundation

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Q Answer Extra Information Mark1 (a)(i) hydrocarbons 1

1 (a)(ii)

Ethane has the smallest moleculesHeptadecane has the highest boiling point

11

1 (a)(iii)

Evaporatingcondense

11

1 (b)(i) WY

11

1 (b)(ii)

floats If no answer written on line allow correct answer indicated in the box

1

1 (b)(iii)

Open the tapStop the flow of liquid when the water has run out

Allow let the water outIgnore remove waterAllow until oil is left behindIgnore filter

11

Total 10

Higher C1 Jan 12, 2

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Use the information on the last slide to answer these questions

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Mark scheme- Higher

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Q Answer Extra Information Mark1 (a)(i) C7H16 Mark answer line first

Answer may be given in table 1

1 (a)(ii)

CnH2n+2 1

1 (b)(i) Carbon monoxide Do not accept carbon oxideDo not accept waterIgnore CO

11

1 (b)(ii)

Because of partial/incomplete combustion (in reaction 2) or complete combustion (in reaction 1)

Allow because there is less insufficient oxygen (in reaction 2) or sufficient oxygen I(in reaction 1)Allow different amounts of oxygen used ( in the reactions) 19O2 (in reaction 1) and 13O2 ( in reaction 2)Ignore air

1

1 (c)(i) 15% Ignore units 1

1 (c)(i) Total 10