WAEC Chemistry 2011 Objective — Question 44

Question 44 of 50 from the West African Examinations Council (WAEC) Chemistry 2011 Objective paper, with the correct answer and a full explanation.

Which of the following organic compounds would react with sodium trioxocarbonate (IV) to liberate carbon (IV) oxide?

A. A. (structure of ethanoic acid: H-C(H2)-COOH)Correct
B. B. (ester structure)
C. C. (aldehyde structure: HC(=O)CH2CH3)
D. D. (ketone structure: CH3C(=O)CH3)

Explanation

Acids react with carbonates and hydrogen carbonates to liberate carbon (IV) oxide. Structure A is ethanoic acid (a carboxylic acid, -COOH group), so it will react with Na2CO3 to liberate CO2.

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