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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2017 · Mains Paper I

Q7(a). Acidic and amphoteric oxides

Question

B₂O₃ is acidic whereas Al₂O₃ is amphoteric. Rationalize your answer.

Answer in brief

Boron is more nonmetallic and its covalent oxide forms borates with bases; aluminium oxide reacts with both acids and strong bases.

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The full model answer

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CoversAcidicamphoteric oxidesMain-group chemistry

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