Moderate

The number of chain isomers of pentane are:

Correct answer: A. Three

  • A. Three
  • B. Two
  • C. One
  • D. Zero

Explanation

Pentane (C5H12) has three chain isomers. These are n-pentane, isopentane (2-methylbutane), and neopentane (2, 2-dimethylpropane). These isomers differ in the arrangement of carbon atoms in the main chain.

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About Fundamental Principles of Organic Chemistry

Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.

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