1. Sr(OH) ₂ 2. Ca(OH) ₂ 3. Mg(OH) ₂ 4. Be(OH) ₂

Answer: 4. Be(OH) ₂ Going down group 2, hydroxides become more basic. Sr(OH)₂ , Ca(OH)₂ and Mg(OH)₂ are basic. Be(OH)₂ dissolves in both acids and bases, so it is amphoteric: option (4).

Topic: Valence, oxidation states and chemical reactivity· Classification of Elements and Periodicity in Properties

Which of the following is an amphoteric hydroxide ?

1. Sr(OH)\(_2\)

2. Ca(OH)\(_2\)

3. Mg(OH)\(_2\)

4. Be(OH)\(_2\)

Doubtly Asked 30 Oct 2026 NEET UG 2019 neet Save WhatsApp Report

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Answer: 4. Be(OH)\(_2\)

Going down group 2, hydroxides become more basic. \(\mathrm{Sr(OH)_2}\), \(\mathrm{Ca(OH)_2}\) and \(\mathrm{Mg(OH)_2}\) are basic. \(\mathrm{Be(OH)_2}\) dissolves in both acids and bases, so it is amphoteric: option (4).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Which of the following is an amphoteric hydroxide ?

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