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p-block Elements and their Compounds - II — Syllabus

Telangana Open School (TOSS) · Class 12 · Chemistry

What p-block Elements and their Compounds - II covers in Telangana Open School (TOSS) Class 12 Chemistry: 4 topics, for the 2026-27 session.

48 questions30 flashcards5 concepts

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4 Topics · Telangana Open School (TOSS) Class 12 Chemistry · 2026-27

Topics in p-block Elements and their Compounds - II

1

Classification of Oxides

  • Oxides are binary compounds of oxygen with metals or non-metals.
  • They are classified based on acid-base behavior: acidic, basic, amphoteric, and neutral oxides.
  • Acidic oxides are formed by non-metals and react with bases to form salt and water.
2

Ozone and its Properties

  • Ozone (O₃) is an allotrope of oxygen with a bent/V-shaped structure.
  • It is prepared by passing oxygen through a silent electric discharge (Siemens ozonizer).
  • Ozone is a powerful oxidizing agent and unstable, decomposing to O₂.
3

Sulphuric Acid – Manufacture and Properties

  • Manufactured by Contact Process using V₂O₅ catalyst.
  • SO₂ is produced by burning sulfur or roasting pyrites.
  • SO₂ is oxidized to SO₃ at 720K and 2 atm pressure using V₂O₅.
4

Hydrogen Halides and Oxoacids of Chlorine

  • Hydrogen halides: HF, HCl, HBr, HI — acidity increases down the group: HF < HCl < HBr < HI.
  • HF has high boiling point due to hydrogen bonding.
  • HCl prepared by NaCl + H₂SO₄ or direct combination of H₂ and Cl₂.

Key Concepts

Central concept: p-Block Elements (Groups 16, 17, 18)

Oxides ClassificationOzone (O₃)Sulphuric Acid (H₂SO₄)Hydrogen Halides (HF, HCl, HBr, HI)Oxides and Oxoacids of ChlorineInterhalogen CompoundsChlorofluorocarbons (CFCs)Noble Gas Compounds

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Frequently Asked Questions

What are the important topics in p-block Elements and their Compounds - II for Telangana Open School (TOSS) Class 12 Chemistry?
Key topics in p-block Elements and their Compounds - II include Classification of Oxides, Ozone and its Properties, Sulphuric Acid – Manufacture and Properties, Hydrogen Halides and Oxoacids of Chlorine. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How should I revise p-block Elements and their Compounds - II for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 48 practice questions on p-block Elements and their Compounds - II. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All Telangana Open School (TOSS) Class 12 Chemistry Syllabus

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