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JAMB Chemistry 1994 Question 33

Question 33

Hydrogen, Oxygen and Oxides

In the diagram above, R is a mixture of

Diagram for this question
  1. A.potassium tetraoxochlorate (VII) and concentrated H2SO4
  2. B.potassium trioxochlorate (V) and concentrated H2SO4
  3. C.potassium tetraoxomanganate (VII) and concentrated HCl
  4. D.manganese (IV) oxide and concentrated HCl
Show the answer and explanation

Answer: D (manganese (IV) oxide and concentrated HCl)

Explanation

The set-up collects dry chlorine. In the laboratory, chlorine is made by heating manganese(IV) oxide with concentrated hydrochloric acid, which oxidizes the HCl to Cl2.