Chapter 13 of 18
Syllabus
Carbon : An important element — Syllabus
Maharashtra Board · Class 9 · Science
What Carbon : An important element covers in Maharashtra Board Class 9 Science: 4 topics, for the 2026-27 session.
43 questions22 flashcards2 formulas & key relations5 concepts
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4 Topics · Maharashtra Board Class 9 Science · 2026-27
Topics in Carbon : An important element
1
Basic Properties and Occurrence of Carbon
- Carbon is a non-metallic element with symbol C, atomic number 6, atomic mass 12
- Electronic configuration: 2,4 with valency 4
- Forms 4 covalent bonds by sharing electrons
2
Allotropes of Carbon
- Carbon has crystalline forms (diamond, graphite, fullerene) and amorphous forms (coal, charcoal, coke)
- Diamond: Hardest natural substance, 3D tetrahedral structure, electrical insulator, density 3.5 g/cm³
- Graphite: Soft, layered hexagonal structure, electrical conductor, density 1.9-2.3 g/cm³
3
Hydrocarbons
- Hydrocarbons contain only carbon and hydrogen atoms
- Saturated hydrocarbons have only single bonds (alkanes)
- Unsaturated hydrocarbons have double or triple bonds (alkenes, alkynes)
4
Carbon Dioxide (CO₂)
- Molecular formula: CO₂, Molecular mass: 44, Melting point: -56.6°C
- Present in air as 0.03%, in exhaled air as 4%
- Colorless, odorless gas, denser than air
Key Concepts
Carbon has atomic number 6Carbon exists in different physical formsCompounds containing only carbon and hydrogenMolecular mass 44Molecular mass 16
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What are the important topics in Carbon : An important element for Maharashtra Board Class 9 Science?
Key topics in Carbon : An important element include Basic Properties and Occurrence of Carbon, Allotropes of Carbon, Hydrocarbons, Carbon Dioxide (CO₂). Study these first, then practise questions on each for Class 9 exams.
How should I revise Carbon : An important element for Class 9 exams?
Learn the core ideas first, then work through the 43 practice questions on Carbon : An important element. Revise definitions regularly and use flashcards for quick recall before the exam.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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