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GK QUESTION#3258

What is the name of the straight-chain alkane CH₃(CH₂)₁₈CH₃?

  1. Atriacontane
  2. Bdecane
  3. CicosaneCorrect answer
  4. Ddodecane
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Answer

C. icosane

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Explanation

CH₃(CH₂)₁₈CH₃ contains 1 + 18 + 1 = 20 carbon atoms and has formula C₂₀H₄₂. The unbranched alkane is icosane, also commonly called eicosane. Decane, dodecane and triacontane contain ten, twelve and thirty carbon atoms.

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