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Which species is amphoteric (H2O)

The same question, asked 2 times: May 2021 S1, 3 May 2023 S2. Every wording below, oldest first.

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  1. Question 1

    May 2021 S1

    88
    Which of the following species is amphoteric in nature?

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  2. Question 2

    3 May 2023 S2

    66
    Which of the following compounds amphoteric in nature?

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