Consider the carbon compounds having following molecular formula : (i) C₃H₆ (ii) C₃H₈ (iii) C₄H₆ (iv) C₆H₆ (v) C₆H₁₂
Generated by claude-sonnet-4-6 · 2026-06-15 06:51 · grounding rag
Model Answer
(a) C₃H₆ is propene, an alkene. It contains one double covalent bond (C=C) in its structure.
(b) C₄H₆ belongs to the alkyne series (triple bond, general formula CₙH₂ₙ₋₂). The first member is C₂H₂ (ethyne/acetylene).
(c) C₆H₁₂ (cyclohexane) forms a ring structure of carbon atoms.
(d) C₃H₈ (propane) belongs to the alkane series (general formula CₙH₂ₙ₊₂; saturated hydrocarbon).
Source: Chapter 4, Section 4.2.2
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Explanation
- (a) C₃H₆ fits the alkene formula CₙH₂ₙ → one C=C double bond.
- (b) C₄H₆ fits CₙH₂ₙ₋₂ (alkyne series). First member = C₂H₂. Don't confuse with alkene (CₙH₂ₙ).
- (c) The passage explicitly names cyclohexane (C₆H₁₂) as the ring compound. Note: C₆H₆ (benzene) is also cyclic, but the passage highlights C₆H₁₂ as the ring example; if asked "which forms ring structure," C₆H₁₂ is the primary textbook answer.
- (d) Alkanes follow CₙH₂ₙ₊₂. Only C₃H₈ (3×2+2=8) fits perfectly. Verify others don't fit before writing.