Alkenes, alcohols, carboxylic acids and polymers GCSE questions
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The functional group in an alkene is
Bromine water with an alkene goes
Ethene + steam (catalyst) produces
Fermentation of glucose with yeast is
Common mistakes
- Do not dump Combined-only depth. Orange to colourless is the test; Triple also wants hydrogen, steam and halogen addition equations.
- Alcohols are not hydrocarbons. CnH2n+1OH is not the alkene formula CnH2n. Do not mix methanol with methanoic acid.
- Orange to green is dichromate, not bromine water (that is orange to colourless for alkenes). Mixing those two colour changes is a classic dump.
- Carboxylic acids are weak, not weak because they are dilute. A dilute strong acid is still strong. Esters are not the same as addition polymers.
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