What is addressed by Markovnikov's rule, in an organic reaction? a. placement of functional groups on carbon atoms within a molecule b. addition of a halogen gas to an alkene c. addition of hydrogen to an alkyne d. addition of a two different groups across a double bond e. placement of a hydroxyl group on the carbon atom with the most hydrogen atoms Which reaction might form cis-trans isomers? a. addition to an alkene b. addition to an alkyne c. elimination of benzene d. reduction of an alcohol e. substitution of an alkane A B D E Clear