NY Chemistry Regents Exam Jan 2023
49 Which formula represents 2-butene?
![Which formula represents 2-butene?](https://static.wixstatic.com/media/d261a6_5338bc1800bf45ccbb19fb77e9ee0294~mv2.png/v1/fill/w_49,h_33,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/d261a6_5338bc1800bf45ccbb19fb77e9ee0294~mv2.png)
Solution:
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.