NY Chemistry Regents Exam Jan 2023
49 Which formula represents 2-butene?
Table P and Table Q on the Reference Table represent naming hydrocarbons. The ending "ene" represents that the molecule has a double bond. Choices 3 and 4 can be eliminated. Number 2 represents the carbon to which the double bond is attached. In choice 2, double bond starts at carbon 2 while in choice 1 it starts at carbon number 1. Choice 2 is the correct answer choice.