Question

4. Explain the following giving examples.
(a) saturated solution
(b) pure substance
(c) colloid
(d) suspension
5. Classify each of the following as a homogeneous or heterogeneous mixture.
soda water, wood, air, soil, vinegar, filtered tea.
6. How would you confirm that a colourless liquid given to you is pure water?
7. Which of the following materials fall in the category of a "pure substance"?
(a) Ice
(b) Milk
(c) Iron
(d) Hydrochloric acid
(e) Calcium oxide
(1) Mercury
(g) Brick
(h) Wood
(i) Air​

Answer 1

Answer:

1. Saturated solution-

depend upon the amount of solute present in solvent, it is called dilute concentration for a saturated solution

2. pure substance-

pure substance it means that all the when particle of the substance are the same in chemical teacher .it is present in fixed proportion

3. colloid-

soil is a heterogeneous mixture but it appears as homogeneous, it cannot be seen by nacked eyes do not settle down

4. suspension-

it is a heterogeneous mixture in which solute particles do not dissolve it can be classified by naked eyes settle down when kept undisturbed

Q5）soda water,air,vinegar, filtered tea =homogeneous

wood,soil=heterogeneous

Q6） water is a pure liquide because it propertion of molecule is everytime fixed

Q7） ice,iron,hydrochloric acid,calcium oxide, murcury =pure substance

milk,brick,wood,air=impure substance

Answer 2

Among these substances ice, iron, mercury and tree are pure substances.