Hydrocarbons and Organic Compounds — O/L Science

What must I remember about Hydrocarbons and Organic Compounds?

• Hydrocarbons: contain only C and H; alkanes (C-C single bond), alkenes (C=C double bond)
• Alkane general formula: CₙH₂ₙ₊₂; methane CH₄, ethane C₂H₆, propane C₃H₈
• Alkene general formula: CₙH₂ₙ; ethene C₂H₄ (monomer for polyethylene)
• Combustion: hydrocarbon + O₂ → CO₂ + H₂O (complete); CO + H₂O (incomplete)

Test yourself (1 minute)

1. Functional groups

   -OH (alcohols), -COOH (carboxylic acids), -COO- (esters)

2. Ethanol (C₂H₅OH)

   fermentation: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂

3. Polymers

   many monomers joined; polyethylene from ethene; addition polymerisation

Practise Hydrocarbons and Organic Compounds questions today

Must know

• Homologous series: same functional group, differ by CH₂; trends in properties

Source: NIE O/L Science — Unit 6: Organic Chemistry

What should I study first?

Next in the syllabus

Where does Hydrocarbons and Organic Compounds fit in the syllabus?

Grade 11 · Term 1