Some chemical reactions of organic compounds
2 marks · EasyConsider the following reaction: [31m[0m.
State the type of reaction shown and explain your answer.
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Addition reaction. Because chlorine is added to ethene without removing any atoms from the original molecule.
Also accept: This is an addition reaction since both chlorine atoms are added to the ethene molecule, forming 1,2-dichloroethane, with no atoms removed.
Common mistakes: Calling it substitution; Incorrect explanation about atoms being removed
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Marking points
M1 (a) · 1 mark · States that the reaction is an addition reaction.
M2 (a) · 1 mark · Explains that both Cl atoms are added to the ethene molecule, and no atoms are removed from the original molecule.
Worked solution
The reaction is an addition reaction because both chlorine atoms are added to ethene, forming a single product (C2H4Cl2) with no atoms removed from the original ethene.