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JAMB Chemistry 2004 Question 42

Question 42

Introduction to Organic Chemistry

An isomer of C5H12 is

  1. A.butane
  2. B.2 – methylbutane
  3. C.2 – methylpropane
  4. D.2 – ethylbutane
Show the answer and explanation

Answer: B (2 – methylbutane)

Explanation

2-methylbutane has 5 carbons and 12 hydrogens. Butane and 2-methylpropane are C4H10; 2-ethylbutane is really a C6 compound (3-methylpentane).