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1、化学英语证书考试（PEC）常用词汇定义Absorbents-Absorbentsarematerialthattakeuporabsorbanyliquidsorvaporsthatcomeincontactwithit.Acetyl-Anychemicalcompoundwithanacetategroup.Acid-Itisawatersolublesourtastingchemicalcompound.AnacidhaspHlessthan7.Themoleculecontainshydrogenanda
2、resourtastingcompoundsandtheirgenericformulaisAH.Acidosis-AcidpoisoninginthebloodAdditives-Inthemanufacturingprocessofplastics,polymerisjustoneconstituent.Thereareotherchemicalslikeimpactmodifiers,colorants,reinforcements,plasticisersandstabilizersetcthatgiv
3、especificpropertiestotheplastics.Thesearecalledadditives.Agrochemical-Chemicals,likehormone,fungicide,orinsecticide,thatimproveorprotectsthecropproduction.Alcohols-Alcoholinchemistrymeansanyorganiccompoundinwhichahydroxylgroup(OH)isboundtoacarbonatom,further
4、boundtootherhydrogenand/orcarbonatoms.Aldehyde-Animportantstartingmaterialandintermediateinorganicsynthesis.Manyaldehydesofindustrialsignificanceareusedassolvents,perfumes,andflavouringagentsorasintermediatesinthemanufactureofplastics,dyes,andpharmaceuticals
5、.Aliphatic-Anyorganiccompoundinwhichthemainstructureisachainofcarbonatomsjoinedtoeachother.Alkali-Acompoundthathastheabilitytoneutralizeanacidtoformasalt.Asubstancewhichissomewhatirritatingorcorrosivetotheskin,eyesandmucousmembranes.Turnsredlitmuspapertoblue
6、.Commonstrongalkalisaresodiumandpotassiumhydroxide.Alkenes-Unsaturatedhydrocarbonsthatcontainoneormorecarbon-carbondoublebonds.AllChemE-AllianceforChemicalSciencesandTechnologiesinEurope.TherepresentativebodyforchemistryandchemicalengineeringinEurope.Amines-
7、Aminesareorganiccompoundscontainingnitrogen.Hereoneormorehydrogenatomsarereplacedbyalkylgroupsorothergroupswherethenitrogenisbondedtoacarbonatominthegroup.Amineareusedinrubber,dyes,pharmaceuticals,andsyntheticresinsandfibresandinahostofotherapplications.Amor
8、phoussolid-Anoncrystallinesolidwithnowell-definedorderedstructure.Anhydride-Anychemicalcompoundobtained,eitherinpracticeorinprinciple,bytheeliminationofwaterfromanothercompound.Aromatics-Aromati
