Carbon has the unique ability to form bonds with other atoms of carbon, giving rise to large molecules. This property is called _____.

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RRB Technician Grade III Official Paper (Held On: 29 Dec, 2024 Shift 1)
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  1. Cyclisation
  2. Polymerisation
  3. Metallic bonding
  4. Catenation

Answer (Detailed Solution Below)

Option 4 : Catenation
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Detailed Solution

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The correct answer is Catenation.

Key Points

  • Catenation is the ability of an element to form bonds with other atoms of the same element, leading to the formation of chains or rings.
  • Carbon exhibits the highest degree of catenation due to its tetravalency, which allows it to form four covalent bonds simultaneously.
  • Due to catenation, carbon can form a wide variety of compounds, including long chains, branched chains, and complex ring structures.
  • This property is essential for the formation of complex organic molecules, such as proteins, DNA, and synthetic polymers.

Additional Information

  • Polymerisation:
    • The process by which small molecules, known as monomers, join together to form a large molecule, or polymer.
    • Examples include the formation of polyethylene from ethylene and the creation of proteins from amino acids.
  • Cyclisation:
    • A chemical reaction in which a linear molecule forms a ring structure.
    • Cyclisation is crucial in forming many biological molecules, such as carbohydrates and nucleic acids.
  • Metallic Bonding:
    • A type of chemical bonding that arises from the attraction between metal atoms and the surrounding sea of electrons.
    • It explains many properties of metals, including electrical conductivity and malleability.
  • Allotropes of Carbon:
    • Carbon exhibits various allotropes due to its catenation property, including diamond, graphite, graphene, and fullerenes.
    • Each allotrope has distinct physical properties due to different arrangements of carbon atoms.

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