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JAMB Chemistry 2008 Question 42

Question 42

Carbohydrates, Proteins and Amines

If glucose is heated with concentrated tetraoxosulphate(VI) acid, it will be dehydrated to

  1. A.carbon
  2. B.carbon(IV) oxide
  3. C.ethene
  4. D.ethanol.
Show the answer and explanation

Answer: A (carbon)

Explanation

Concentrated H2SO4 removes the elements of water from glucose (C6H12O6 → 6C + 6H2O), leaving black carbon.