Question

This Comound: CH3-CH2-C=C-CH3

is also known as
A. 3-pentene
B. 2-pentene
C. 3-pentyne
D. 2-pentyne

Answer 1

Actually it isn't anything. The two carbons with the double bond are short a H atom each. Assume those two H atoms are there then it is 2-pentene.