1. Air shows the property of…

(a)  N2 (b) O2 (c) Both (a) and (b) (d) None of these.

2. Mixture can be

(a)  homogeneous (b) heterogeneous (c) Both (a) and (b) (d)  pure substance

3. Metal Alloy is a…

(a)  Compound (b) Element (c) Homogeneous mixture (d) Heterogeneous mixture

4.  In sugar solution,

(a) Sugar is solute, water is solvent (b) Sugar is solvent, water is solute

(c) Both are solutes (d) Both are solvents.

5. If we burn graphite,

(a) residue will be left (b) no residue will be left (c) it will not burn (d) it will change into diamond.

6. Air is regarded as a mixture because:
(a)Its pressure may very (b)Its temperature may change
(c)Its volume changes under different conditions (d)Its composition may vary

7. Which of the following is a compound?
(a)Stainless steel (b)Bronze (c)Graphite (d)Hydrogen sulphide

8. If we increase the temperature, then solubility of solid in liquid is…

(a) Increases (d) Decreases (c) Remains same (d) Can’t say

9. In which of the following the constituents are present in any ratio?
(a)Mixture (b)Compound (c)Solution (d)Element

10. Colloidal Solutions are…

(a) Homogeneous Mix (b) Heterogeneous Mix (c) Compound (d) None of these

11. Carbon is…

(a) Matter (b) Compound (c) Salt (d) Element

12.Milk is…

(a) Homogeneous Mix (b) Heterogeneous Mix (c) Compound (d) None of these

13. Salt can be obtained from sea water by:
(a)Filtration (b)Decantation (c)Evaporation (d)Sublimation

14. Sample contains two substances and has uniform properties. The sample is:
(a)A compound (b)A heterogeneous mixture (c)An element (d)A homogeeous mixture

15. Blood is an example of…

(a) Homogeneous Mix (b) Heterogeneous Mix (c) Compound (d) None of these

16. Which of the following is considered to be a pure substance?
(a)Granite (b)Sodium chloride (c)Muddy water (d)Milk of magnesia

17. Compounds:
(a)Are the same as mixtures. (b)Can be separated by their physical properties.
(c)Contain only type of element. (d)Are different kinds of atoms chemically combined with each other?

18. Mixture:

(a)Are the same as element. (b)Can not be separated.
(c)Contain only type of element. (d)Are different kinds of substances combined with each other in any ratio.

19. Paint is…

(a) Mixture (b) Compound (c) Element (d) All of these

20. Solution of Milk and water is…

(a) Homogeneous Mixture (b) Heterogeneous (c) Compound (d) Salt

21) Milky Glass is an example of…

a) Solid sol b) Gel c) Aerosol d) Emulsion

22) Which among is an example of emulsion?

a) Milk b) Face Cream c) cod liver oil d) all of these

23) Fog is an example of…

a) Solid sol b) Gel c) Aerosol d) Emulsion

24) Which among the following is an example of solid foam?

I) Bread II) Pumice Stone III) Cloud IV) Paints

a) Only I b) Both II & III c) Both I & II d) All of these

25) In colloidal solution the dispersed phase is same as…

a) Solvent b) Solute c) solution d) all of these

26) Chalk and water mixture is an example of…

a) Colloidal b) Homogeneous mixture c) Heterogeneous mixture d) suspension.

27) Which among the following is property of true solution?

a) Particles are not thoroughly mixed b) Particles are not dissolved c) Particles are thoroughly mixed d) all of these.

28) In non-aqueous solution…

a) water is solvent b) water is not solvent c) both A & B d) none of these

29) Which among the following is a property of colloids?

I) Brownian Movement II) Tyndal effect III) Coagulation IV) Electrophoresis

a) Only I b) Only II & IV c) All of these except IV d) All of these

30) Sewage disposal is an example of…

a) Homogeneous Mixture b) Solution c) Colloids d) Gel

31) Which one among the following is best method of separation in industry?

a) Evaporation b) Crystallization c) Boiling c) None of these

32. Colloidal solutions looks like…

a) Homogeneous b) Heterogeneous c) Solution d) None of these

33. Which mixture from the following can be separated by sublimation?

a) Salt & Water b) Camphor & Iodine c) Ammonium Chloride & Salt d) All of these

34. Which among the following can be separated by centrifugation?

I) Blood II) Milk Solution III) Milk IV) Salt solution

a) Only I b) Both I & II c) Both I & III d) All of these

35. The compounds which we get directly from the nature is called as…

a) Organic b) Inorganic c) Chemical d) All of these

36. The mixtures in which particles can be seen by open eyes known as…

a) Homogeneous b) Heterogeneous c) Solution d) all of these

37. The mixtures in which particles can’t be seen by open eyes known as…

a) Homogeneous b) Heterogeneous c) Suspension d) all of these

38. The technique in which separation is achieved by difference in density…

a) Evaporation b) Centrifugation c) Sublimation d) Distillation.

39. The technique in which separation is achieved by difference in boiling point…

a) Evaporation b) Centrifugation c) Sublimation d) Distillation.

40. Sugar from sugar solution can be separated by…

a) Evaporation b) Centrifugation c) Separating funnel d) Sublimation

Answers:

1

2

3

4

5

6

7

8

9

10

C

C

C

A

D

D

D

A

A

B

11

12

13

14

15

16

17

18

19

20

D

B

C

D

B

B

D

D

A

A

21

22

23

24

25

26

27

28

29

30

A

D

C

C

B

D

C

B

D

C

31

32

33

34

35

36

37

38

39

40

B

A

C

C

A

B

A

B

D

A