Free Printable class 9

1.

How can you separate NH4Cl and sand

a)

sublimation

b)

evaporation

2.

a)

A

b)

B

c)

C

d)

D

3.

a)

A

b)

B

c)

C

d)

D

4.

a)

A

b)

B

c)

C

d)

D

5.

a)

A

b)

B

c)

C

d)

D

6.

a)

A

b)

B

c)

C

d)

D

7.

a)

A

b)

B

c)

C

d)

D

8.

a)

A

b)

B

c)

C

d)

D

9.

a)

A

b)

B

c)

C

d)

D

10.

a)

A

b)

B

c)

C

d)

D

11.

a)

A

b)

B

c)

C

d)

D

12.

a)

A

b)

B

c)

C

d)

D

13.

a)

A

b)

B

c)

C

d)

D

14.

Name the mixture whose particles are large enough to scatter light:

a)

True solution

b)

Homogenous solution

c)

Colloid

d)

all of the above

15.

Which of the following property does not describe a compound:

a)

it is composed of two or more elements

b)

it is a pure substance

c)

constituents cannot be separated by physical means

d)

mixed in any proportion by mass

16.

Smell of Hydrogen sulfide gas

a)

rotten eggs

b)

burning tyre

c)

pleasant

d)

sweet

17.

(a) is the non-metal which is in liquid state at room tempearture.

18.

Which of the following techniques is used in diagnostic lab for blood and urine test:

a)

Sublimation

b)

Crystallization

c)

Centrifugation

d)

Evaporation

19.

Which of the following is a chemical change?

a)

cooking food

b)

melting of wax

c)

dissolving sugar in water

d)

mixing iron fillings with sulfur powder

20.

The continuous zig-zag movement of colloidal particles in a dispersion medium is called:

a)

Oscillation

b)

Tyndall effect

c)

Dispersion

d)

Brownian movement

21.

A colloid with a solid dispersed phase and liquid dispersing medium is called (a) .

22.

The clear liquid which is left behind in the beaker after settling down of sediments is called:

a)

Solvent

b)

Filtrate

c)

Supernatant

d)

Solution

23.

If a solution contains 60g of common salt in 340g water, the mass by mass percentage will be (a) %.

24.

Which of the following is a true solution?

a)

Blood

b)

Milk

c)

Chalk powder in water

d)

Salt solution

25.

(a) technique can be used to separate different components of chlorophyll.

26.

Boiling point of Nitrogen is ________ deg C.

a)

- 183

b)

-186

c)

-196

d)

-190

27.

We can separate crystals of alum from impure samples through (a) method.

28.

(a) is the mixture of two or more metals or a metal and a non-metal and cannot be separated into their components by physical methods.

29.

Air is regarded as a mixture because:

a)

Its pressure may very

b)

Its pressure may very

c)

Its volume changes under different conditions

d)

Its composition may vary

30.

Two substances A and B when bought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. the substance C is:

a)

A compound

b)

An element

c)

A mixture

d)

None of the above

31.

A sample contains two substances and has uniform properties. The sample is:

a)

A compound

b)

A heterogeneous mixture

c)

An element

d)

A homogeneous mixture

32.

White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?

a)

They are homogeneous mixtures and be classified as metallic alloys.

b)

The materials are heterogeneous mixtures and can be classified by their components

c)

The samples have variable compositions and are classified as metallic solutions.

d)

The samples are heterogeneous mixtures that can be separated using magnetic properties.

33.

In which of the following constituents are present in the ratio?

a)

Mixture.

b)

Compound.

c)

Solution.

d)

Colloid.

34.

A mixture will appear translucent in the case of?

a)

Copper sulphate + water.

b)

Alum + water.

c)

Sugar + water.

d)

Starch + water.

35.

Brass is an example of?

a)

Homogeneous compound.

b)

Homogeneous mixture.

c)

Heterogeneous mixture.

d)

Heterogeneous compound.

36.

When two liquids do not mix, they form two separate layers and are known as

a)

(a) Miscible liquids

b)

(b) Immiscible liquids

c)

(c) Saturated liquids

d)

(d) Super saturated liquids

37.

The size of the particle of solute is ............ for colloidal Solution

a)

<1nm

b)

>1nm

c)

Between 1nm and 100nm

d)

Above 100 nm

38.

When two liquids do not mix, they form two separate layers and are known as

a)

(a) Miscible liquids

b)

(b) Immiscible liquids

c)

(c) Saturated liquids

d)

(d) Super saturated liquids

39.

Tyndall effect means

a)

Rays scattered by dust particles

b)

Rays travelling from one medium to other

c)

Rays undergoing Refraction

d)

Rays undergoing totally reflected

40.

Tyndall effect is observed in forests because of

a)

tress

b)

high oxygen level

c)

mist and dust particles in the air

d)

less sunlight

41.

concentration of 36g of NaCl in 100 g of water is

a)

23%

b)

26.47%

c)

29.32%

d)

21.11%

42.

How would H2O be classified? Check all that apply.

a)

Atom

b)

Molecule

c)

Compound

43.

How would O2 be qualified. Check all answers that apply.

a)

Atom

b)

Molecule

c)

Compound

44.

What are atoms composed of?

a)

Protons and electrons.

b)

Protons, neutrons, and electrons.

c)

Neutrons and electrons.

d)

Ions, elements, and compounds.

45.

The beginning substances in a chemical reaction are called...

a)

reactants

b)

products

46.

The amount of solute present per unit volume or per unit mass of the solution/solvent is known as

a)

(a) Composition of solute

b)

(b) Concentration of a solvent

c)

(c) Concentration of a solute

d)

(d) Concentration of a solution

47.

Sugar water is a

a)

solution

b)

suspension

c)

colloid

48.

Milk is a

a)

solution

b)

suspension

c)

colloid

49.

Name the flask

a)

round bottom flask

b)

flat bottom flask

c)

conical flask

50.

NAME THE APPARATUS

a)

DISTILLATOR

b)

CONDENSOR

c)

FRACTIONATING COLUM

51.

NAME THE SEPARATION TECHNIQUE

a)

FRACTIONAL DISTILLATION

b)

DISTILLATION

c)

SEPARATING FUNNEL

d)

EVAPORATION

52.

NAME THE PROCESS

a)

DISTILLATION

b)

FRACTIONAL DISTILLATION

c)

EVAPORATION

d)

CONDENSATION

53.

NAME THE SEPARATION TECHNIQUE DISTILLATION

a)

EVAPORATION

b)

DISTILLATION

c)

CONDENSATION

54.

NAME THE SEPARATION TECHNIQUE AND NAME THE COMPONENTS IT IS USED TO SEPARATE

4 lines

55.

LIST THE PROPERTY OF METAL WHICH MAKES THEM SUITABLE FOR MAKING UTENSILS USED IN COOKING FOOD

4 lines

56.

Air is regarded as a mixture because:

a)

Its pressure may very

b)

Its pressure may very

c)

Its volume changes under different conditions

d)

Its composition may vary

57.

The process used to separate oil and water is:

a)

Distillation

b)

Sublimation

c)

Separating funnel

d)

chromatography

58.

Two substances A and B when bought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. the substance C is:

a)

A compound

b)

An element

c)

A mixture

d)

None of the above

59.

A sample contains two substances and has uniform properties. The sample is:

a)

A compound

b)

A heterogeneous mixture

c)

An element

d)

A homogeneous mixture

60.

White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?

a)

They are homogeneous mixtures and be classified as metallic alloys.

b)

The materials are heterogeneous mixtures and can be classified by their components

c)

The samples have variable compositions and are classified as metallic solutions.

d)

The samples are heterogeneous mixtures that can be separated using magnetic properties.

61.

.A student is given a mixture of iron filings and sulphur in thee ratio 1 : 2 by weight. He was then asked to heat the mixture over a flame and to observe the olor change. The student will observe that the mixture becomes:

a)

Black

b)

Grey

c)

Yellow

d)

Orange

62.

Distillation is a good separation technique for:

a)

Solids

b)

Liquids

c)

Solid alloys

d)

Gases

63.

If we put camphor in an open container, its amount keeps on decreasing due to the phenomenon of

a)

Evaporation

b)

Precipitation

c)

Condensation

d)

Sublimation

class 9

Total questions: 63

Worksheet time: 31mins

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