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Question

Amphoteric oxides react only with acids to form salt and water.


A
True
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B
False
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Solution

The correct option is B False
  • Amphoteric oxides are defined as metal oxides that react with both acids as well as bases to create salts and water.
  • Base Sodium hydroxide(NaOH) react with a metal oxide ZnO to form salt Sodium zincate(Na2ZnO2)and water.
  • Chemical equation:

2NaOH(aq)Sodiumhydroxide+ZnO(aq)ZincoxideNa2ZnO2(aq)Sodiumzincate+H2O(l)Water

  • Sulphuric acid(H2SO4) reacts with an amphoteric metal oxide ZnO to form salt Zinc sulfate and water.
  • Chemical equation:

ZnO(s)Zincoxide+H2SO4(aq)SulphuricacidZnSO4(aq)Zincsulphate+H2O(l)Water

Therefore the given statement is false.


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