Some chemical reactions of organic compounds

2 marks · Normal

Complete these sentences about organic reactions: (i) Combustion reactions of organic compounds require the presence of ______. (ii) Addition reactions often involve compounds called ______.

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(i) oxygen (ii) alkenes

Also accept: (i) air (ii) unsaturated hydrocarbons

Common mistakes: Putting air for (i); writing 'alkanes' for (ii).

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Marking points

B1 · 1 mark · Correctly completes blank with 'oxygen' for combustion.

B1 · 1 mark · Correctly completes blank with 'alkenes' for addition.

Worked solution

(i) oxygen; (ii) alkenes.