Chapter summary
Organic Chemistry, at a glance
Recognise molecular families and connect structures, reactions, fuels and materials.
O-Level 6092 (2026) / SEC G3 K324 (2027)
Quick revision
Revisit the essentials, then return to an explanation when you need it.
- Alkane
Combustion; chlorine substitution under UV; larger molecules can crack.
- Alkene
Bromine/hydrogen addition and addition polymerisation.
- Ethanol
Fermentation makes it; combustion releases energy; oxidation forms ethanoic acid.
- Polymer
Match the repeat unit to its monomer; distinguish physical and chemical recycling.
Pure only
Pure: add C4 and branched structures, isomerism, ethene hydration, carboxylic-acid reactions, esters and condensation-polymer hydrolysis. Reagents and essential conditions matter; exact numerical process settings are not required.
Revisit an explanation
- Fuels, fractions and bioethanol
- Alkanes: build a valid carbon skeleton
- Alkenes: a double bond creates new reactions
- Alcohols: identify -OH and follow ethanol
- Carboxylic acids: recognise -COOH
- Esters: join two fragments and keep track of their origins
- Addition polymers: open the double bond, keep the substituents
- Condensation polymers and depolymerisation
- Evaluate plastic use and recycling