Hello. I have a couple of questions. Why are the boiling points of alkenes lower than alkanes? My thinking: something with van der waas forces?. Not sure. Why do haloalkanes have higher boiling points than alkanes? My thinking: dipole-dipole forces? What is an experiment that can be used to identify an alkane, an alkene and a carboxyllic acid from eachother? My thinking: Test 1) Bromine water test to identify alkane. Test 2) then to differentiate between carboxyllic acid and alkene, react them with a base, and you will be left with an alkene? What is a test that can be used to test yeast fermentation? My thinking: yeast in closed container with sugar. then test alcohol content at certain intervals?. I need some help here on how to design a better test. Thanks in Advance.