Defination :  -Unsaturated hydrocarbon -Have Unless 1 double  bond C=C C n H 2n  n= 2,3,4…..   H H H H <ul><li>Physical pr...
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ALKENE

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ALKENE

  1. 1. Defination : -Unsaturated hydrocarbon -Have Unless 1 double bond C=C C n H 2n n= 2,3,4….. H H H H <ul><li>Physical properties : </li></ul><ul><li>Low melting and boiling </li></ul><ul><li>points </li></ul><ul><li>soluble in organic solvent </li></ul><ul><li>insoluble in water </li></ul><ul><li>Less dense than water. </li></ul><ul><li>cannot conduct </li></ul><ul><li>electricity </li></ul>Chemical properties: -Combustion reaction C 2 H 4 (g) + 3O 2 (g) 2CO 2 +2H 2 O -Addition reaction C 2 H 4 (g) + A-B C 2 H 4 AB - Polimerization reaction Alkene molecules undergo addition reaction with one another Compare and contrast alkanes and alkenes -Sootines of flame -Reaction with bromine -Reaction with KMnO 4 Characteristics of homologous series -has a general formula -differ from each other by –CH 2 -prepared by similar methods -physical properties change with increasing number of carbon ALKENES C=C The molecular formulae, Name an structural formulae Example : C 2 H 4 – Ethene C=C H H H H
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