Take three test tubes and label them as A, B and C. Fill up to two-thirds with sugar solution, chalk powder in water, and milk, respectively. Allow these to stand on a test tube stand for some time.
(i) In which of the test tubes will you observe particles settle down?
(ii) Which of the test tubes will look transparent?
(iii) Which of the test tubes will look opaque?
Take three test tubes and label them as A, B and C. Fill up to two-thirds with sugar solution, chalk powder in water, and milk, respectively. Allow these to stand on a test tube stand for some time.
(i) In which of the test tubes will you observe particles settle down?
(ii) Which of the test tubes will look transparent?
(iii) Which of the test tubes will look opaque?
Mixtures: are a kind of matter which is formed by mixing two or more pure substances (elements and compounds) in any proportion such that they do not undergo any change and retain their individual identity.
For example, air, milk, tap water, etc.
On the basis of composition, the mixture can be divided into two categories:
Homogeneous mixture: In this mixture components are evenly distributed throughout its volume and cannot be differentiated.
For example, sugar and water solution.
Heterogeneous mixture: In this mixture components are not uniformly distributed throughout its volume and can be easily differentiated.
For example, sand and water.
i) In test tube B chalk powder settles down and it can be easily separated by filtration. Thus it is a heterogeneous mixture.
ii) Test tube A will appear transparent because sugar molecules dissolve in water and are uniformly distributed throughout it thus it is a homogeneous mixture. it is the true solution.
iii) test tube C appears opaque because milk is a colloid having particles suspended in it and it is a heterogeneous mixture.
Mixtures: are a kind of matter which is formed by mixing two or more pure substances (elements and compounds) in any proportion such that they do not undergo any change and retain their individual identity.
For example, air, milk, tap water, etc.
On the basis of composition, the mixture can be divided into two categories:
Homogeneous mixture: In this mixture components are evenly distributed throughout its volume and cannot be differentiated.
For example, sugar and water solution.
Heterogeneous mixture: In this mixture components are not uniformly distributed throughout its volume and can be easily differentiated.
For example, sand and water.
i) In test tube B chalk powder settles down and it can be easily separated by filtration. Thus it is a heterogeneous mixture.
ii) Test tube A will appear transparent because sugar molecules dissolve in water and are uniformly distributed throughout it thus it is a homogeneous mixture. it is the true solution.
iii) test tube C appears opaque because milk is a colloid having particles suspended in it and it is a heterogeneous mixture.
