p-block Elements and their Compounds - II
Telangana Open School (TOSS) · Class 12 · Chemistry
Most important questions from p-block Elements and their Compounds - II for Telangana Open School (TOSS) Class 12 Chemistry board exam 2026. MCQs, short answer, and long answer questions with marks.
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Sample Questions
Which of the following is a neutral oxide?
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NO
NO is a neutral oxide as it does not show acidic or basic properties. CO₂, SO₂, and P₂O₅ are acidic oxides.
What is the product when SO₂ reacts with NaOH?
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Na₂SO₃
SO₂ reacts with NaOH to form sodium sulfite (Na₂SO₃) and water: SO₂ + 2NaOH → Na₂SO₃ + H₂O.
Which of the following oxides reacts with water to form an alkali?
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Na₂O
Na₂O is a Group 1 metal oxide. It reacts with water to form NaOH, a strong alkali: Na₂O + H₂O → 2NaOH.
Which of the following is an acidic oxide?
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CrO₃
CrO₃ is an acidic oxide formed by a metal in a high oxidation state. It reacts with alkalies to form chromates. FeO, CuO, and CaO are basic oxides.
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