Answer:
The hydrocarbon has a double C-C bond.
Explanation:
Degree of unsaturation is a calculation that allows to know the number of rings and π-bonds.
For a hydrocarbon of formula CₓHₙ, the degree of unsaturation is:
[tex]DoU= \frac{2x+2-n}{2}[/tex]
For C₆H₁₂:
[tex]DoU= \frac{2*6+2-12}{2}[/tex] = 1.
As the hydrocarbon is a straight-chain hydrocarbon, there are not rings, thus, degree of unsaturation is due 1 π-bond, that means that hydrocarbon has a double C-C bond.
I hope it helps!