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JAMB Chemistry 2005 Question 25

Question 25

Water

Natural water collected from rivers and ponds contains oxygen, carbon (IV) oxide and

  1. A.nitrogen
  2. B.hydrogen
  3. C.chlorine
  4. D.sulphur (IV) oxide
Show the answer and explanation

Answer: A (nitrogen)

Explanation

Rain and surface water dissolve gases from the air, so natural water contains dissolved nitrogen as well as oxygen and carbon(IV) oxide.