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what are addition reactions?
reactions in which two or more molecules combine to form a larger one with no other products
how does the double bond affect alkenes?
the double bond makes alkenes more reactive than alkanes
what do alkenes undergo addition reactions with?
hydrogen and bromine
what happens when alkenes are reacted with hydrogen?
when alkenes are reacted with hydrogen, the double bonds open up and bond to hydrogen, forming an alkane
what is the bromine test used to test for?
it is used to test for the presence of alkenes
what is bromine water and its colour?
bromine water is an orange solution
what happens to the bromine water when shaken with an alkene?
the bromine water will decolourise as the bromine reacts with the alkene to form substituted alkanes
