GK QUESTION#3258
What is the name of the straight-chain alkane CH₃(CH₂)₁₈CH₃?
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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.