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Test for presence of c=c bond
Shake w bromine water starts brown then goes colourless to form dibromoalkane
Alcohols formed from alkene
300 degrees c, phosphoric acid, 60-70 atm
Alkene oxidised
Acidification postassium manganese purple solution decolouredforms diol
Halogenoalkane aqueous potassium hydroxide conditions
Warm and reflux
Potassium cyanide halogenoalkane conditions
Ethanol and reflux
Alkene from alcohol
Conc phos acid and heat
POCl3 significance
Liquid mixes w aycl chloride so frac dis