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ORGANIC CHEMISTRY (p;g 6)

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Physical Properties: It is a colour less gas. (Page#7) It has pleasant odour. It is slightly lighter than air. It is slightly soluble in water (1 ml in 4ml) and soluble in organic solvents. It burns with luminous flame. Chemical Properties: Addition Of H₂: Ethene adds H₂ in the presence of catalyst Ni or Pt to form ethane gas. CH₂=CH₂ + H₂_ Ethene CH3-CH3 ethane Addition Of X₂ (Br₂): Ethene adds a bromine molecule to ferm dibromo ethane. In this reaction colour of Bromine is discharged proving that ethene is unsaturated (Bromine water test) CH₂ P CH₂ Br-CH₂ - CH₂ - Br Rthene 1,2, dibromo ethane Addition Of HX (HBr): Ethene reacts with Hydrogen Bromine to form ethyl Bromide CH₂=CH₂ + HBr CH3-CH₂-Br Combustion: Ethene burns in air to produce CO₂ and water C2H4 + 302 2CO₂ + 2H₂O + heat Polymerization: Ethene polymerize to form polythene n (CH₂=CH₂) (-CH₂-CH₂-)n Polyethene ethene Qe Briefly explain ethyne? ALKYNE KTHYNG: GH H-C: C-H H..C: C..H Class: Unsaturated hydrocarbon When calcium carbide is reacted with water ethyne gas is obtained Ca (OH); + C₂H₂ (ethyne) CaC₂ + 2H₂O # ...
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