question_answer 57)

    Which of the following statements is not correct?                 (a) All metal carbonates react with acid to give a salt, water and carbon dioxide                 (b) All metal oxides react with water to give salt and acid                 (c) Some metals react with acids to give salt and hydrogen                 (d) Some non-metal oxides react with water to form an acid

Answer:

  (b) Most metal oxides are insoluble in water but some of these (e.g., Na2O, CaO) dissolve in water to form alkalies not salt and acid e.g.,