Question

question 1 (1 point)
which of these is an unsaturated hydrocarbon?
a) c₄h₁₀
b) c₅h₁₀
c) c₃h₈
d) c₆h₁₄
e) none of the above

Explanation:

Saturated hydrocarbons follow the formula \(C_nH_{2n + 2}\). Unsaturated hydrocarbons have a formula \(C_nH_{2n}\) (for alkenes) or \(C_nH_{2n-2}\) (for alkynes).

• For \(C_4H_{10}\), \(n = 4\), \(2n+2=2\times4 + 2=10\), so it is saturated.
• For \(C_5H_{10}\), \(n = 5\), \(2n=2\times5 = 10\), so it is unsaturated (alkene).
• For \(C_3H_8\), \(n = 3\), \(2n+2=2\times3+2 = 8\), so it is saturated.
• For \(C_6H_{14}\), \(n = 6\), \(2n+2=2\times6+2 = 14\), so it is saturated.

Answer:

B. \(C_5H_{10}\)