Class 9 | Carbon: An important element

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Cotton. Cotton is a natural fibre while rest all are fossil fuels.

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Methane is often referred to as "marsh gas" because it is commonly produced in marshy areas. In these environments, organic matter decays anaerobically, leading to the release of methane gas. The name "marsh gas" highlights its association with the natural decomposition of organic material in wet, marshy conditions.

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Graphite is the allotrope of carbon used as a lubricant and possesses excellent conductivity due to its layered structure.

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Proteins. Proteins are carbonaceous nutrients while rest all are natural fibres.

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Carbon dioxide exists in the atmosphere primarily as a gas, contributing to the greenhouse effect.

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The atomic number of carbon is 6, indicating the number of protons in its nucleus.

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Charcoal. Charcoal is a non-crystalline form of carbon while rest all are types of coal

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Carbon typically exhibits a valency of 4, forming covalent bonds in most of its compounds.

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Ornaments. Ornaments are made from diamonds while rest all are made from graphite.

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Nitrogen is an essential element in proteins, playing a crucial role in various life processes.

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Methane. It is a marsh gas while rest are allotropes of carbon.

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Ethene. It is an unsaturated hydrocarbon with double bond between two carbon atoms while rest are saturated hydrocarbons with single bond between two carbon atoms.

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Carbon is tetravalent, meaning it forms four covalent bonds in its compounds, due to its atomic structure. Carbon has four valence electrons in its outer shell, and it needs to share electrons with other atoms to achieve a stable, octet configuration. By forming four covalent bonds, carbon can complete its outer shell with eight electrons, resembling the stable configuration of noble gases. This tetravalent nature allows carbon to create a diverse range of organic compounds with various structures and properties.