The oxides of beryllium BeO is_______________?
Correct answer: C. Amphoteric
- A. Acidic
- B. Basic
- C. Amphoteric
- D. Neutral
Explanation
BeO reacts with both acids and strong bases, so it is amphoteric: it forms beryllium salts with acids and beryllates in alkaline solution. This behaviour results from the small, highly polarizing Be2+ ion. Students commonly choose b because most metallic oxides are basic, but BeO is an important exception among Group 2 oxides.
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About Reactions of Group II Elements
Group II reactions cover the behaviour of beryllium, magnesium, calcium, strontium and barium with water, oxygen, halogens, acids and nitrogen. The trends in reactivity, hydroxide solubility and basicity, along with the thermal decomposition of carbonates and nitrates, depend on increasing atomic size down the group.
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