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The correct statements among I to III regarding group 13 element oxides are. (I) Boron trioxide is acidic. (II) Oxides of aluminium and gallium are amphoteric. (III) Oxides of indium and thallium are basic.

1. (I) and (II) only
2. (I) and (III) only
3. (II) and (III) only
4. (I), (II) and (III) only

Correct answer: (II) and (III) only

Solution

Option (II) is correct because aluminium and gallium oxides can react with both acids and bases, demonstrating amphoteric behavior. Option (III) is also correct as the oxides of indium and thallium exhibit basic properties, reacting with acids. However, boron trioxide is indeed acidic, making option (I) incorrect in the context of the question.

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