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JAMB Chemistry 2021 Question 7

Question 7

Chemical Bonding

The boiling point of methanol is lower than that of water because

  1. A.intermolecular forces in methanol are weaker than those in water
  2. B.methanol is an alcohol while water is an oxide
  3. C.methanol is organic compound while water is an inorganic
  4. D.methanol is a covalent compound while water is an ionic compound
Show the answer and explanation

Answer: A (intermolecular forces in methanol are weaker than those in water)

Explanation

Water forms more hydrogen bonds per molecule than methanol, so less energy is needed to separate methanol molecules and it boils at a lower temperature.