下列哪一種分子式的碳氫化合物可能是烯類（含一個碳碳雙鍵、無環）？
Answer and explanation
Correct answer: B. C₃H₆
- Step 1: 烯類通式為 CₙH₂ₙ，n=3 時為 C₃H₆（丙烯）；C₃H₈ 是烷，C₃H₄ 是炔。
Answer
C₃H₆.
Why not the others: C₃H₈、C₃H₄、C₃H₁₀不符合題意。
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