A mixture is a substance which consists of two or more elements or compounds which are not chemically combined together. e.g. air, food, wood, milk, ink, brine, lime water, glass, paints, soil, kerosene etc.
There are two types of mixtures, which are as follows :
(a) Homogeneous Mixture or Solution : A homogeneous mixture has same composition throughout its mass. There are no visible boundaries of separation between the various constituents. e.g. solution of sugar in water, alloy, solution of salt in water, a mixture of alcohol and water etc.
(b) Heterogeneous Mixture : A heterogeneous mixture does not have a uniform composition throughout its mass. It has visible boundaries of separation between the various components. e.g. gun powder, solution of `K_2Cr_2O_7` in water, solution of `CaCO_3` in water, solution of oil in water, soil, etc.
`text(Note) :` A mixture which boils at a definite temperature and distills over without any change in composition is called azeotropic mixtures. e.g. ethanol-water, acetone-benzene, benzene-chloroform etc.
A mixture is a substance which consists of two or more elements or compounds which are not chemically combined together. e.g. air, food, wood, milk, ink, brine, lime water, glass, paints, soil, kerosene etc.
There are two types of mixtures, which are as follows :
(a) Homogeneous Mixture or Solution : A homogeneous mixture has same composition throughout its mass. There are no visible boundaries of separation between the various constituents. e.g. solution of sugar in water, alloy, solution of salt in water, a mixture of alcohol and water etc.
(b) Heterogeneous Mixture : A heterogeneous mixture does not have a uniform composition throughout its mass. It has visible boundaries of separation between the various components. e.g. gun powder, solution of `K_2Cr_2O_7` in water, solution of `CaCO_3` in water, solution of oil in water, soil, etc.
`text(Note) :` A mixture which boils at a definite temperature and distills over without any change in composition is called azeotropic mixtures. e.g. ethanol-water, acetone-benzene, benzene-chloroform etc.