Question Detail

CHM 101 CHM 101 Past Questions Objective Question

Question

Which of these compounds does NOT belong to a homologous series?
Options
A CH₄
Correct Answer
B C₂H₁₀
C C₂H₆
D C₃H₁₂
Correct Answer

Option A is the correct answer.

Detailed Explanation

A homologous series has a general formula and successive members differ by CH₂. Alkanes: CₙH₂ₙ₊₂. C₂H₁₀ fits CₙH₂ₙ₊₂? 2n+2=6, not 10. C₃H₁₂? 3×2+2=8, not 12. The question may contain typos. Typically, C₂H₁₀ does not exist. CH₄ is methane (alkane), so it belongs to a series. The intended 'not belong' is likely the one with an impossible formula or one that doesn't fit the pattern of the others.

Hint

Check if the formula fits the general formula of a known homologous series (e.g., alkanes: CₙH₂ₙ₊₂).

Question Info