at the centre of the cluster and form a spherical structure called micelle

These micelles remain suspended in water like particles in a colloidal solution

The various micelles present in water do not come together to form a precipitate as each micelle repels the other because of the ion-ion repulsion.

Thus, the dust particles remain trapped in micelles (which remain suspended) and are easily rinsed away with water. Hence, soap micelles remove dirt by dissolving it in water.


What We Have Learnt

  • Carbon forms a large variety of compounds. Its tetravalency and the property of catenation and ability to form four single bonds, a double bond and two single bonds, a triple bond and a single bond or two double bonds makes carbon versatile and brings one special branch in chemistry for carbon compund
  • Hydrocarbons are the compounds of carbon and hydrogen.
  • Hydrocarbons are of two types – saturated hydrocarbons (alkanes) and unsaturated hydrocarbons (alkenes and alkynes)
  • Carbon forms covalent bonds with its own atoms and atoms of other elements such as hydrogen,oxygen, sulphur, nitrogen and chlorine.
  • The functional groups such as alcohols, aldehydes, ketones and carboxylic acids bestow characteristic properties to the carbon compounds that contain them. Even C = C,C C , give characteristic properties.
  • A group / series of hydrocarbons having same general formula, with two successive compounds possessing difference of - CH2 and with similar structures and similar properties (i.e., same functional group) are called a homologous series.

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