JEE Mains · Chemistry · STD 11 - 8.1. Organic chemistry Nomenclature of organic compounds
Identify the correct IUPAC name of hydrocarbon (\(x\)) containing three primary carbon atoms and with molar mass \(72\text{ g mol}^{-1}\).
- A 1,1-Dimethylcyclopropane
- B 2,2-Dimethylpropane
- C 2-Methylbutane
- D n-pentane
Answer & Solution
Correct Answer
(C) 2-Methylbutane
Step-by-step Solution
Detailed explanation
Let the hydrocarbon be an alkane with general formula \(C_nH_{2n+2}\). Molar mass \(= 14n + 2 = 72 \Rightarrow 14n = 70 \Rightarrow n = 5\) The molecular formula is \(C_5H_{12}\). The structural isomers of \(C_5H_{12}\) are: n-pentane: \(CH_3-CH_2-CH_2-CH_2-CH_3\) (2 primary…
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