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Is Matter around us pure?

Total questions: 85

Worksheet time: 14mins

Name
Class
Date
1.

Air is regarded as mixture because?

a)

It's pressure may vary.

b)

It's temperature may vary.

c)

Volume changes under different compositions.

d)

It's compositions may vary.

2.

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

a)

Mixture.

b)

Compound.

c)

Solution.

d)

Colloid.

3.

A mixture will appear translucent in the case of?

a)

Copper sulphate + water.

b)

Alum + water.

c)

Sugar + water.

d)

Starch + water.

4.

Brass is an example of?

a)

Homogeneous compound.

b)

Homogeneous mixture.

c)

Heterogeneous mixture.

d)

Heterogeneous compound.

5.

The process of removing impurities from a solution by using filter paper is called as

a)

Chromatography

b)

Filtration

c)

Sublimation

d)

Solution

6.

The component of the solution that is dissolved in the solvent (usually present in lesser quantity) is called (a)  

7.

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

8.

How one can separate ammonium chloride from a mixture containing ammonium chloride and sodium chloride?

a)

(a) Precipitation

b)

(b) Sublimation

c)

(c) Chromatography

d)

(d) Cetrifugation

9.

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

a)

<1nm

b)

>1nm

c)

Between 1nm and 100nm

d)

Above 100 nm

10.

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

11.

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

12.

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

13.

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

14.

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

15.

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.

16.

.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

17.

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

18.

What is the solute in the soda water?

a)

Water

b)

Carbon dioxide

c)

Sugar

d)

Oxygen

19.

(a)   was the first scientist to give the term Element.

20.

Suspension can be separated by filtration.

a)

TRUE

b)

FALSE

21.

Solution is a (a)   mixture.

22.

Immiscible liquids separate out into layers depending on their

a)

Volumes

b)

Weights

c)

Masses

d)

Densities

23.

By which process can we separate cream from milk?

a)

Centrifugation

b)

Chromatography

c)

Promation

d)

Filtration

24.

Which method do we use to separate two miscible liquids?

a)

Centrifugation

b)

Evaporation

c)

Distillation

d)

Separating Funnel

25.

A compound can have variable composition.

a)

False

b)

Wrong Question

c)

Sometimes

d)

True

26.

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.

27.

A mixture will appear translucent in the case of?

a)

Copper sulphate + water.

b)

Alum + water.

c)

Sugar + water.

d)

Starch + water.

28.

Which of the following is an example of heterogeneous substance?

a)

Bottled water.

b)

Table salt.

c)

Pieces of copper.

d)

Candle.

29.

Which of the following is an example of homogeneous substance?

a)

Granite.

b)

Copper sulphate.

c)

m&m candy.

d)

Muddy water.

30.

Two chemical species X and Y combine together to form a product P which contains both X and Y
X + Y   →\rightarrow    P
X and Y cannot be broken down into simpler substances by simple chemical
reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compound
(iii) X and Y are elements
(iv) P has a fixed composition

a)

(a) (i), (ii) and (iii),

b)

(b) (i), (ii) and (iv)

c)

(c) (ii), (iii) and (iv)

d)

(d) (i), (iii) and (iv)

31.

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

32.

What is the solute in the soda water?

a)

Water

b)

Carbon dioxide

c)

Sugar

d)

Oxygen

33.

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

34.

Rusting of an article made up of iron is called

a)

(a) corrosion and it is a physical as well as chemical change

b)

(b) dissolution and it is a physical change

c)

(c) corrosion and it is a chemical change

d)

(d) dissolution and it is a chemical change

35.

Which of the following non-metal is a good conductor of electricity?

a)

(a) Aluminium

b)

(b) Silicon

c)

(c) Graphite

d)

(d) Gold

36.

Brass is an alloy. It is a mixture of______

a)

30% Zinc 70% copper

b)

20% copper 80% nickel

c)

40% iron 80% copper

d)

35% gold 65% zinc

37.

How will you separate the components of sugar solution

a)

evaporation

b)

crystallization

c)

filtration

d)

chromatography

38.

Tyndall effect is observed in both suspensions and colloids.

a)

True

b)

Never

c)

Sometimes

d)

False

39.

which of the following is a mixture?

a)

air

b)

ice

c)

hydrochloric acid

d)

mercury

40.

Tick the COMPOUNDS.

a)

SOAP

b)

METHANE

c)

CALCIUM CARBONATE

d)

SILICON

e)

TIN

41.

WHICH ONE IS A MIXTURE?

a)

BLOOD

b)

CARBON DIOXIDE

c)

SILICON

d)

SODIUM

e)

TIN

42.

HOW CAN WE SEPERATE A MIXTURE OF SALT AND CAMPHOR/?

(a)  

43.

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

a)

True solution

b)

Homogenous solution

c)

Colloid

d)

all of the above

44.

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

45.

Smell of Hydrogen sulfide gas

a)

rotten eggs

b)

burning tyre

c)

pleasant

d)

sweet

46.

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

47.

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

a)

Sublimation

b)

Crystallization

c)

Centrifugation

d)

Evaporation

48.

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

a)

Oscillation

b)

Tyndall effect

c)

Dispersion

d)

Brownian movement

49.

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

50.

Which of the following is a true solution?

a)

Blood

b)

Milk

c)

Chalk powder in water

d)

Salt solution

51.

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

52.

(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.

53.

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

54.

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

55.

Air is regarded as mixture because?

a)

It's pressure may vary.

b)

It's temperature may vary.

c)

Volume changes under different compositions.

d)

It's compositions may vary.

56.

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

57.

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

58.

Name the effect

a)

brownian

b)

tyndall

c)

suspension

d)

colloidal

59.
Sugar water is a 
a)
solution
b)
suspension
c)
colloid
60.
Milk is a 
a)
solution
b)
suspension
c)
colloid
61.
type of mixture that doesn't separate on its own but still contains undissolved particles
a)
solution
b)
colloid
c)
suspension
62.

The Tyndall Effect is not visible in which of the following?

a)

Solution

b)

Suspension

c)

Colloid

d)

Heterogeneous Mixture

63.

The Tyndall Effect is not visible in which of the following?

a)

Solution

b)

Suspension

c)

Colloid

d)

Heterogeneous Mixture

64.

Which of the following will result in the formation of a mixture?

a)

Crushing of marble tiles into smaller particles.

b)

Breaking ice cubes into smaller pieces.

c)

Adding sodium metal to water.

d)

Adding milk in water.

65.
Combination of two or more pure substances that are not chemically combined
a)
compound          
b)
atom
c)
mixture 
d)
element
66.
A pure substance that cannot be broken down into other substances by chemical or physical means. 
a)
compound          
b)
atom
c)
mixture 
d)
element
67.
A mixture that is uniform and well mixed is _____.
a)
homogeneous
b)
hetergeneous
c)
pure substance
d)
compoud
68.
The picture shown here is what type of mixture?
a)
homogeneous
b)
hetergeneous
c)
pure substance
d)
element
69.
The picture shown here is what type of mixture?
a)
homogeneous
b)
hetergeneous
c)
pure substance
d)
element
70.
This is a type of heterogeneous mixture in which the particles are dispersed and do not settle out.
a)
alloy
b)
solution
c)
suspension
d)
colloid
71.
Water is
a)
a pure substance
b)
a mixture
72.

What is evaporation

a)

When solid is turned into gas

b)

When gas turns into a solid

c)

When liquid turns into a gas

73.

solid examples select all that apply

a)

brick

b)

Lake

c)

desk

d)

Wind

e)

Paper

74.

hard question. What is h2o

a)

solid

b)

Liquid

c)

Gas

d)

Don’t know

75.

What is carbon dioxide

a)

Solid

b)

Liquid

c)

Gas

d)

Don’t know

76.

select all liquid

a)

Water

b)

Brick

c)

Rain

d)

Ice cube

e)

Juice

77.
What is matter?
a)
Anything that takes up space
b)
space
c)
 liquid 
d)
solid 
78.
Wood burning is an example of 
a)
matter changes 
b)
burning 
c)
physical changes 
d)
Chemical change 
79.
What is a chemical change 
a)
wood burning 
b)
melting butter 
c)
salt dissolving 
d)
wind blowing 
80.
What is a physical change 
a)
cutting wood
b)
rusting nail 
c)
raining
d)
fire
81.
melting butter is an example of 
a)
physical change
b)
chemical change
82.
What are the 3 states of mater
a)
air solid gas
b)
matter
c)
Solid liquid gas
d)
R2-D2
83.
what wood be matter
a)
a table 
b)
apple
c)
you
d)
all of the above
84.

Air is regarded as mixture because?

a)

It's pressure may vary.

b)

It's temperature may vary.

c)

Volume changes under different compositions.

d)

It's compositions may vary.

85.

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

a)

Evaporation

b)

Condensation

c)

Sublimation

d)

Precipitation

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