C10 - ORGANIC REACTIONS EXAM QUESTIONS AND
ANSWERS 100% PASS
functionalUgroupsU-UcorrectUanswer-
aUparticularUgroupUofUatomsUwhichUareUresponsibleUforUhowUtheUmoleculeUreactsU(givesUaU'family'UofUorga
nicUcompoundsUtheirUcharacteristicUreactions)
HomologousUseriesU-UcorrectUanswer-AUseriesUofUorganicUcompoundsUwithUtheUsameUfunctionalUgroup
generalUformulaU-UcorrectUanswer-TheUsimplestUalgebraicUformulaUofUaUmemberUofUaUhomologousUseries
generalUformulaUofUtheUalkenesU-UcorrectUanswer-CnH2n
AreUalkenesUsaturatedUorUunsaturated?U-UcorrectUanswer-unsaturatedU(theyUhaveUaUC=CUbond)
functionalUgroupUofUalkenesU-UcorrectUanswer-C=C
howUdoUalkenesUburnU(inUcomparisonUtoUalkanes)?U-UcorrectUanswer-withUaUsmokier,UyellowUflame
WhyUdoUalkenesUburnUwithUaUsmokierUflameUthanUalkanes?U-UcorrectUanswer-
thereUisUincompleteUcombustion
whyUareUalkenesUnotUusedUasUfuel?U-UcorrectUanswer-
theyUreleaseUlessUenergyUperUmikeUinUcombustionUthanUalkanes
structureUofUetheneU-UcorrectUanswer-C2H4
structureUofUpropeneU-UcorrectUanswer-C3H6
structureUofUbuteneU-UcorrectUanswer-C4H8
, structureUofUpenteneU-UcorrectUanswer-C5H10
completeUcombustionUofUetheneU-UcorrectUanswer-etheneU+UoxygenU->UcarbonUdioxideU+Uwater
WhyUareUalkenesUmoreUreactiveUthanUalkanes?U-UcorrectUanswer-BecauseUofUtheUC=CUbond
howUdoUmoleculesUreactUwithUalkene?U-UcorrectUanswer-theyU'add'UtoUtheUalkeneUacrossUtheirUdoubleUbond
whatUreactionsUdoUalkenesUmostlyUcarryUoutU(withUotherUmolecules)?U-UcorrectUanswer-additionUreactions
AlkeneUreactionUwithUhalogensU-UcorrectUanswer-decolourisesUbromineUwater
reactionUofUetheneUwithUbromineUwaterU-UcorrectUanswer-etheneU+UbromineU->Udibromoethene
AlkeneUreactionUwithUhydrogenU-UcorrectUanswer-formsUaUsaturatedUhydrocarbonU(anUalkane)
whyUisUtheUadditionUreactionUofUhydrogenUtoUalkenesUusedUinUunsaturatedUoils?U-UcorrectUanswer-
toUstraightenUtheUmoleculesUandUincreaseUtheirUmeltingUpoints
reactionUofUpenteneUwithUhydrogenU-UcorrectUanswer-etheneU+UhydrogenU-(catalyst)>Uethane
whatUconditionsUareUrequiredUforUtheUreactionsUbetweenUalkenesUandUhydrogen?U-UcorrectUanswer-
nickelUcatalyst,U60UdegreesUcelsius
alkeneUreactionUwithUwaterU(steam)U-UcorrectUanswer-reversibleUreactionUwhichUformsUanUalcohol
whatUconditionsUareUrequiredUforUtheUreactionUbetweenUalkenesUandUsteam?U-UcorrectUanswer-
energyUtoUheatUtheUgasesUandUgenerateUaUhighUpressure,Ucatalyst
reactionUofUetheneUwithUsteamU-UcorrectUanswer-etheneU+UsteamU<=>Uethanol
ANSWERS 100% PASS
functionalUgroupsU-UcorrectUanswer-
aUparticularUgroupUofUatomsUwhichUareUresponsibleUforUhowUtheUmoleculeUreactsU(givesUaU'family'UofUorga
nicUcompoundsUtheirUcharacteristicUreactions)
HomologousUseriesU-UcorrectUanswer-AUseriesUofUorganicUcompoundsUwithUtheUsameUfunctionalUgroup
generalUformulaU-UcorrectUanswer-TheUsimplestUalgebraicUformulaUofUaUmemberUofUaUhomologousUseries
generalUformulaUofUtheUalkenesU-UcorrectUanswer-CnH2n
AreUalkenesUsaturatedUorUunsaturated?U-UcorrectUanswer-unsaturatedU(theyUhaveUaUC=CUbond)
functionalUgroupUofUalkenesU-UcorrectUanswer-C=C
howUdoUalkenesUburnU(inUcomparisonUtoUalkanes)?U-UcorrectUanswer-withUaUsmokier,UyellowUflame
WhyUdoUalkenesUburnUwithUaUsmokierUflameUthanUalkanes?U-UcorrectUanswer-
thereUisUincompleteUcombustion
whyUareUalkenesUnotUusedUasUfuel?U-UcorrectUanswer-
theyUreleaseUlessUenergyUperUmikeUinUcombustionUthanUalkanes
structureUofUetheneU-UcorrectUanswer-C2H4
structureUofUpropeneU-UcorrectUanswer-C3H6
structureUofUbuteneU-UcorrectUanswer-C4H8
, structureUofUpenteneU-UcorrectUanswer-C5H10
completeUcombustionUofUetheneU-UcorrectUanswer-etheneU+UoxygenU->UcarbonUdioxideU+Uwater
WhyUareUalkenesUmoreUreactiveUthanUalkanes?U-UcorrectUanswer-BecauseUofUtheUC=CUbond
howUdoUmoleculesUreactUwithUalkene?U-UcorrectUanswer-theyU'add'UtoUtheUalkeneUacrossUtheirUdoubleUbond
whatUreactionsUdoUalkenesUmostlyUcarryUoutU(withUotherUmolecules)?U-UcorrectUanswer-additionUreactions
AlkeneUreactionUwithUhalogensU-UcorrectUanswer-decolourisesUbromineUwater
reactionUofUetheneUwithUbromineUwaterU-UcorrectUanswer-etheneU+UbromineU->Udibromoethene
AlkeneUreactionUwithUhydrogenU-UcorrectUanswer-formsUaUsaturatedUhydrocarbonU(anUalkane)
whyUisUtheUadditionUreactionUofUhydrogenUtoUalkenesUusedUinUunsaturatedUoils?U-UcorrectUanswer-
toUstraightenUtheUmoleculesUandUincreaseUtheirUmeltingUpoints
reactionUofUpenteneUwithUhydrogenU-UcorrectUanswer-etheneU+UhydrogenU-(catalyst)>Uethane
whatUconditionsUareUrequiredUforUtheUreactionsUbetweenUalkenesUandUhydrogen?U-UcorrectUanswer-
nickelUcatalyst,U60UdegreesUcelsius
alkeneUreactionUwithUwaterU(steam)U-UcorrectUanswer-reversibleUreactionUwhichUformsUanUalcohol
whatUconditionsUareUrequiredUforUtheUreactionUbetweenUalkenesUandUsteam?U-UcorrectUanswer-
energyUtoUheatUtheUgasesUandUgenerateUaUhighUpressure,Ucatalyst
reactionUofUetheneUwithUsteamU-UcorrectUanswer-etheneU+UsteamU<=>Uethanol