Carbon an Important Element — Maharashtra (SSC) Class 9 Science Solutions (Free)
Free step-by-step Maharashtra (SSC) Class 9 Science solutions for "Carbon an Important Element" — important questions with detailed answers, download PDF for board exam preparation.
TL;DR: Free step-by-step Maharashtra (SSC) Class 9 Science solutions for "Carbon an Important Element" — important questions with detailed answers, download…
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Q1: What is carbon? Name any three allotropes of carbon.
Carbon is a non-metallic element with atomic number 6. Its three allotropes are: 1) Diamond - hardest form, used in cutting tools and jewelry. 2) Graphite - soft, conducts electricity, used in pencils. 3) Coal - porous, used as fuel and in filters.
Q2: Explain covalent bonding in carbon compounds with an example.
Carbon forms covalent bonds by sharing electrons with other atoms. In methane (CH4), carbon shares one electron with each of four hydrogen atoms, forming four C-H covalent bonds. This allows carbon to form stable molecules with various elements.
Q3: What is tetravalency of carbon?
Tetravalency means carbon has a valency of 4, allowing it to form four covalent bonds with other atoms. This property enables carbon to form diverse organic compounds including hydrocarbons, alcohols, and carboxylic acids.
Q4: Distinguish between diamond and graphite based on their structure and properties.
Diamond: Each carbon atom is bonded to four other carbons in a tetrahedral arrangement, making it extremely hard and transparent. Graphite: Carbon atoms form layers with weak van der Waals forces between them, making it soft, slippery, and electrically conductive.
Q5: What is an organic compound? Give two examples.
Organic compounds contain carbon and hydrogen, often with oxygen and nitrogen. They are produced by living organisms or synthesized in labs. Examples: Methane (CH4) - simplest hydrocarbon found in natural gas. Glucose (C6H12O6) - sugar produced during photosynthesis.
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