An unsaturated hydrocarbon is hydrogenated by adding one hydrogen molecule to form an alkane. If there are six carbon atoms in the hydrocarbon, the structural formula of the unsaturated hydrocarbon is:

Question

Question 23 options:

a) CH3 – CH = CH – CH2 – CH2 – CH3
b) CH3 – CH2 – C º C – CH2 – CH3
c) CH3 – C = C – CH2 – CH2 – CH3
d) CH3 – CH2 – CH º CH – CH2 – CH3
e) CH3 – C = C – CH º CH – CH2

Answer 1

The correct answer is c) CH3 – C = C – CH2 – CH2 – CH3. This is because an unsaturated hydrocarbon contains at least one double bond between carbon atoms. In this case, the structural formula has a double bond between the second and third carbon atoms (CH3 – C = C – CH2 – CH2 – CH3).