Question

I.Multiple choice questions(5) 1)Fog,clouds are an example of -------
a) aerosol b) colloid c) suspension d) emulsion 2) Sponge can be compressed, it is a a) solid. b) liquid c)gas d) foam.
3)An impure sample of potash alum can be purified by
a) Evaporation
b) crystallisation c)centrifugation
d) Filtration. 4)Chalk dissolved in. water is an example of a)true solution
b) colloid c) suspension
d) saturated solution. 5)50gm Sugar. is. dissolved in a glass of water at 30°c. On heating this solution it will. a) crystallise.
b) evaporate
c) become unsaturated d) sugar will char. 6)When the Solid or liquid is. dispersed in a gas it is called ----- 7)When smoke mixes with ------- it forms smog. 8)The principle of separating funnel. is difference. in the. ------ of two liquids.
9) liquid mixtures can be separated by ------- and --------.
10) classify each of the following as a homogeneous or heterogeneous mixture soda water , wood, air , Soil , vinegar , Filtered tea .
II. Answer the following. 11)Explain the following given examples. a) saturated solution. b)pure substance. c) colloid. d) suspension (4m). 12)List the points of difference between homogeneous and. heterogeneous mixtures. (2)
13) To make a saturated solution ,36g of sodium chloride. is dissolved in 100g of water at 293 k. Find its concentration at this temperature. (2). 14) a) what are alloys? (1) b) what is Tyndall effect ? (1).
15)a)What is condenser ? (1) b) Why is mixtures called. impure substance (1) c)what is aerosol? (1) d ) What is the principle of separation of immiscible liquids? (1)e) what is chromatography?(1). 16)a) How will you separate a mixture containing kerosene and petrol (difference in their boiling point is. more than 25°c), which are miscible with each other?(4)
b) What type of mixtures are separated by the technique of crystallisation?(1)​

Answer 1

Answer:

It's answer is huge so no-one can type it

Answer 2

Answer:

Fog, clouds are an example of *

1 point

(a) aerosol

(b) colloid

(c) suspension

(d) emulsion