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Ethylene

Category: Chemistry

Level: SS2

Syllabus topic: SS2 Organic Chemistry (Alkenes)

Formula: C₂H₄

Description: Ethylene is a hydrocarbon. It is a colorless, flammable gas with a sweet musky odor.

📝 Exam Key Points
  1. Ethene is an alkene with a C=C double bond; general formula CₙH₂ₙ.
  2. Carbons are sp² hybridised: planar molecule with 120° bond angles.
  3. Unsaturated, so it undergoes addition reactions (decolourises bromine water) and polymerises to polyethene.

Ethylene

C₂H₄

Chemistry · SS2

Syllabus topic: SS2 Organic Chemistry (Alkenes)

Key Exam Points

  1. Ethene is an alkene with a C=C double bond; general formula CₙH₂ₙ.
  2. Carbons are sp² hybridised: planar molecule with 120° bond angles.
  3. Unsaturated, so it undergoes addition reactions (decolourises bromine water) and polymerises to polyethene.

Student Notes

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