Carbon : An important element — Chapter Summary
Maharashtra Board · Class 9 · Science
Summary of Carbon : An important element for Maharashtra Board Class 9 Science. Part of the Maharashtra Board Class 9 Science syllabus.
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Overview
Carbon is a non-metallic element that is abundantly found in nature and forms the basis of all organic compounds. It is one of the most important elements on Earth, found in both free and combined states. Carbon has the unique ability to form long chains and complex structures, making it essential f
Key Concepts
Carbon has atomic number 6
Carbon has atomic number 6, atomic mass 12, electron configuration 2,4, and valency 4. It occurs freely as diamond and graphite, and in combined form
Carbon exists in different physical forms
Carbon exists in different physical forms with same chemical properties. Crystalline forms include diamond (hardest natural substance, 3D structure),
Compounds containing only carbon and hydrogen
Compounds containing only carbon and hydrogen atoms. Saturated hydrocarbons have single bonds (like methane CH₄, ethane C₂H₆), while unsaturated hydro
Molecular mass 44
Molecular mass 44, colorless, odorless gas. Prepared from CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂. It's denser than air, turns limewater milky, doesn't suppo
Molecular mass 16
Molecular mass 16, colorless gas found in natural gas (87%), biogas, and marshy places. Burns with blue flame: CH₄ + 2O₂ → CO₂ + 2H₂O + heat. Undergoe
Learning Objectives
- Understand the occurrence and properties of carbon in nature
- Learn about different allotropes of carbon including diamond, graphite, and fullerene
- Study the structure and properties of hydrocarbons
- Explore the properties, preparation, and uses of carbon dioxide
- Understand methane gas, its properties, and applications including biogas
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Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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