DIFFERENCES BETWEEN MIXTURES & COMPOUNDS

BY NIRANJAN

KRISHNAN

CLASS IX

CLASSIFICATION OF MATTER

MATTER

PURE SUBSTANCES

ELEMENTS COMPOUNDS

IMPURE SUBSTANCES

MIXTURES

WHAT IS A COMPOUND ?It is a pure substance. It is made up of two or

more elements. The smallest particle of compounds is molecule. The properties of a

compounds differ from that of the elements present in them.

EG : H2O , CO2 , HCl etc.

WHAT IS MIXTURE ?

• It is a matter of two or more

substances(elements , compounds or both)

whose particles are in contact with each other

but not chemically combined.

• The elements or compounds present in

mixtures exhibit their properties.

E.g: sand in water, iron and sulfur mixture etc.

DIFFERENCES BETWEEN MIXTURES AND COMPOUNDS

Mixtures • Consists of two or more

elements or compounds or both which are not chemically combined.

• It may heterogeneous or homogenous.

• The individual components can be separated by physical means.

• Usually no energy takes place during formation of mixture.

• Its components may be present in it in varying proportions.

Compounds• Consists of two or more elements

combined by chemical bonding.• A compound is always

homogenous.• The components cannot be

broken by physical means , only by chemical means.

• During formation of compound it is always accompanied by energy like liberation of heat etc.

• Its components must be present in a definite proportion by mass.

PHYSICAL MEANS (applicable only for mixtures)

• Physical means refer to the separation of components by processes such as magnetic separation in Iron & Sulfur mixture, boiling of liquid in carbon dioxide and water mixture.

Chemical means

• Compounds can be separated by chemical means such as by electricity in separation of water and hydrogen from water , by electrolysis separation of sodium and chlorine from Sodium Chloride.

THE END

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