are you know compounds and their characteristics

Compounds

A compound is a combination of two or more elements in a definite proportion. The ratio of elements in a particular compound is always same. It can be decomposed into its elements by using some physical or chemical methods. Such as H2O is a compound where one Oxygen atom combines with two Hydrogen atoms. Compounds are mainly of two types.

  • Organic compounds: Organic compounds are the compounds which are obtained from plant and animal sources. They are the carbon compounds (molecules containing carbon). E.g. Methane
  • Inorganic compounds: Inorganic compounds are compounds obtained from non living sources. Eg. Minerals

Characteristics of compound

  • Compounds always contain a definite proportion of the same elements by mass. Water as a compound, always contains hydrogen and oxygen in the ratio 1:8 by mass.
  • The properties of compounds are totally different from the elements from which they are formed. For example, while water is normally used for extinguishing fire, its elements are not. Hydrogen is combustible and oxygen is a supporter of combustion.
  • Compounds are homogeneous.
  • During the formation of a compound, energy in the form of heat, light or electricity is either evolved or absorbed. Coal when burnt, gives heat and light energies.

Properties of Compounds

  • The ratio of elements in a compound is fixed.
  • The individual properties of the components are not retained in a compound. Both sodium and chlorine are poisonous but their compound, table salt (NaCl) is absolutely essential to life.
  • It takes large inputs of energy to separate the components of a compound.

Examples of Compounds

  • Water (H2O)
  • Sugar (C12H22O11)
  • Aluminium Chloride (NH4Cl)
  • Aluminium Oxide (Al2O3)
  •  Nitric Acid (HNO3)