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JAMB Chemistry 1979 Question 28

Question 28

Acids, Bases and Salts

An anhydride is

  1. A.a compound which has no water of crystallization
  2. B.an oxide whose solution in water has a pH greater than 7
  3. C.an oxide whose solution in water has a pH less than 7
  4. D.an oxide that has hydrogen atoms
  5. E.an amphoteric oxide.
Show the answer and explanation

Answer: C (an oxide whose solution in water has a pH less than 7)

Explanation

An (acid) anhydride is a non-metal oxide that reacts with water to form an acid, e.g. SO3 + H2O → H2SO4, so its solution has pH below 7.