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Carbon and its Compounds — Syllabus

Punjab Board · Class 10 · Science

What Carbon and its Compounds covers in Punjab Board Class 10 Science: 4 topics, for the 2026-27 session. Topics include 1 Bonding in Carbon.

45 questions40 flashcards5 concepts

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A diagram showing the atomic structure of carbon, specifically its nucleus with protons and neutrons, and the distribution of its 6 electrons in the K and L shells, highlighting the 4 valence electron
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4 Topics · Punjab Board Class 10 Science · 2026-27

Topics in Carbon and its Compounds

1

4.1 Bonding in Carbon – The Covalent Bond

  • Carbon has atomic number 6 and electronic configuration 2, 4 – so it has 4 valence electrons.
  • Carbon cannot form C⁴⁻ (gaining 4 electrons would be difficult for the nucleus) or C⁴⁺ (losing 4 electrons requires too much energy).
  • Carbon overcomes this problem by SHARING electrons – forming COVALENT BONDS.
2

4.2 Versatile Nature of Carbon

  • Carbon forms millions of compounds due to two unique properties: CATENATION and TETRAVALENCY.
  • Catenation: Carbon's ability to bond with OTHER carbon atoms to form long chains, branched chains, or rings.
  • Tetravalency: Carbon has 4 valence electrons, so it can form 4 covalent bonds – with C, H, O, N, S, Cl and other elements.
3

4.2.5 Nomenclature of Carbon Compounds

  • Naming rule: Identify number of C atoms → use prefix (meth=1, eth=2, prop=3, but=4, pent=5, hex=6) + appropriate suffix.
  • Suffix for alcohols: –ol (e.g., methanol, ethanol, propanol).
  • Suffix for aldehydes: –al (e.g., methanal, ethanal, propanal).
4

4.3 Chemical Properties of Carbon Compounds

  • COMBUSTION: Carbon and its compounds burn in oxygen to produce CO₂, H₂O, heat and light. These are oxidation reactions.
  • Saturated hydrocarbons (alkanes) burn with a CLEAN BLUE flame.
  • Unsaturated hydrocarbons (alkenes, alkynes) burn with a YELLOW, SOOTY flame (incomplete combustion, black smoke).

Key Concepts

Covalent bonds form when atoms shareAllotropes are different forms ofCatenation is carbon's unique abilitySaturated compounds contain only single bondsStructural isomers are compounds with

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Frequently Asked Questions

What are the important topics in Carbon and its Compounds for Punjab Board Class 10 Science?
Key topics in Carbon and its Compounds include 1 Bonding in Carbon – The Covalent Bond, 2 Versatile Nature of Carbon, 2.5 Nomenclature of Carbon Compounds, 3 Chemical Properties of Carbon Compounds. Study these first, then practise questions on each for the Punjab Board Class 10 board exam.
How should I revise Carbon and its Compounds for the Punjab Board Class 10 board exam?
Learn the core ideas first, then work through the 45 practice questions on Carbon and its Compounds. 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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