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JAMB Chemistry 2020 Question 32

Question 32

Carbohydrates, Proteins and Amines

What is the ratio of carbon : hydrogen :oxygen in carbohydrate?

  1. A.1:2:1
  2. B.2:1:1
  3. C.3:1:1
  4. D.1:1:1
Show the answer and explanation

Answer: A (1:2:1)

Explanation

Carbohydrates have the general formula Cx(H2O)y; for glucose, C6H12O6, C : H : O = 6 : 12 : 6 = 1 : 2 : 1.