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JAMB Chemistry 2002 Question 25

Question 25

Water

Steam changes the colour of anhydrous cobalt (II) chloride from

  1. A.blue to pink
  2. B.white to red
  3. C.white to green
  4. D.blue to white
Show the answer and explanation

Answer: A (blue to pink)

Explanation

Anhydrous cobalt (II) chloride is blue; it turns pink when it takes up water, which is the standard test for water.