passwella.
Menu

JAMB Chemistry 2006 Question 50

Question 50

Redox Reactions

5SO2(g) + 2KMnO4(aq) + 2H2O(l) → K2SO4(aq) + 2MnSO4(aq) + 2H2SO4(aq)
In the reaction above, the products give a

  1. A.purple solution
  2. B.purple precipitate
  3. C.colourless precipitate
  4. D.colourless solution
Show the answer and explanation

Answer: D (colourless solution)

Explanation

SO2 reduces purple MnO4− to almost colourless Mn2+; all the products are soluble, so a colourless solution forms.