alleryThe general formula for saturated hydrocarbons (alkanes) is
ACₙH₂ₙ
BCₙHₙ
CCₙH₂ₙ₋₂
DCₙH₂ₙ₊₂
Answer & Solution
Correct answer: D. CₙH₂ₙ₊₂
1. Alkanes contain only single C-C and C-H bonds (saturated).
2. General formula: CₙH₂ₙ₊₂.
3. Methane CH₄ (n=1): 2(1)+2 = 4 hydrogens ✓; Ethane C₂H₆ (n=2): 2(2)+2 = 6 ✓.
4. Alkenes (double bond) have CₙH₂ₙ; alkynes CₙH₂ₙ₋₂.
_Source: syllabus Science, Ch 4 "Carbon and its Compounds", §4.2.1_
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