The general formula for alkanes is
ACₙH₂ₙ
BCₙH₂ₙ₊₂CORRECT
CCₙH₂ₙ₋₂
DCₙHₙ
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Why the answer is B, and why the others tempt you.
Alkanes: CₙH₂ₙ₊₂ (saturated). Alkenes: CₙH₂ₙ. Alkynes: CₙH₂ₙ₋₂.
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