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Revision: Elements of Group 13, 14 and 15 Chemistry HSC Science (General) 11th Standard Maharashtra State Board

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Definitions [6]

Define the following:

Adsorption

Adsorption is the property due to which a substance absorbs gases, liquids and solids on its surface.

Define the following:

Carbonization

The process of the slow conversion of vegetable matter into carbon-rich substances is called carbonization.

Define catenation.

Carbon possesses a unique property of combining with other carbon atoms to form long chains. This property is called catenation. The chains can be straight, branched or closed.

The self-linking property of atoms of an element to form very long straight or branched chains and cyclic rings is known as catenation. This property is shown by carbon whose small size and tetravalency helps it to form large structures by self-linking.

Definition: Tetravalency of Carbon

The characteristic of the carbon atom, by virtue of which it forms four covalent bonds, is called the tetravalency of carbon.

Definition: Catenation

The property of self-linking of atoms of an element through covalent bonds in order to form straight chains, branched chains and cyclic chains of different sizes is known as catenation.

Define Allotrophy

When an element possess 2 or more different forms in the same state, they are called allotropes and the phenomenon is known as allotropy. Diamond and graphite are the 2 allotropes of carbon.

Key Points

Key Points: Carbon: A Versatile Element
  • Carbon forms many compounds, from simple ones like methane to complex ones like DNA, due to its bonding versatility.
  • Catenation allows carbon to form long chains or rings by bonding with itself.
  • Carbon forms single, double, and triple covalent bonds, leading to saturated and unsaturated compounds.
  • Being tetravalent, carbon forms four strong covalent bonds with elements like H, O, N, and Cl.
  • Isomerism increases the number of carbon compounds by allowing different structures with the same molecular formula.
 
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