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chemistry 9

Total questions: 120

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

Which is/ are the example(s) of Solid Sol?

a)

Jelly

b)

Coloured gemstone

c)

Milk

d)

Milky glass

2.

What is the solute in the soda water?

a)

Water

b)

Carbon dioxide

c)

Sugar

d)

Oxygen

3.

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

4.

A solution for making tea contains 20 g of sugar in 150 ml of water. Find the concentration of solution.

4 lines
5.

What is Tyndall effect?

4 lines
6.

What are the properties of metal?

a)

Malleable

b)

Sonorous

c)

Ductile

d)

Lustre

7.

Suspension can be separated by filtration.

a)

TRUE

b)

FALSE

8.

Solution is a (a)   mixture.

9.

Who is this person?

a)

Robert Boyle

b)

Antoine Lavoisier

c)

John Tyndall

d)

None of the above

10.

What is Pure substance?

4 lines
11.

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.

12.

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

a)

Mixture.

b)

Compound.

c)

Solution.

d)

Colloid.

13.

A mixture will appear translucent in the case of?

a)

Copper sulphate + water.

b)

Alum + water.

c)

Sugar + water.

d)

Starch + water.

14.

Brass is an example of?

a)

Homogeneous compound.

b)

Homogeneous mixture.

c)

Heterogeneous mixture.

d)

Heterogeneous compound.

15.

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

a)

Chromatography

b)

Filtration

c)

Sublimation

d)

Solution

16.

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

17.

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

18.

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

19.

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

a)

<1nm

b)

>1nm

c)

Between 1nm and 100nm

d)

Above 100 nm

20.

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

21.

Dissolved Sodium chloride can be separated from salt solution by

a)

Chemical process of extraction

b)

Physical process of evaporation

c)

Chemical processes

22.

Blood and sea water are

a)

blood is a mixture whereas sea water is a compound

b)

blood is a compound and sea water is a mixture

c)

both mixtures

23.

Define a pure substance?

a)

A pure substance consists of a single type of particles and constant composition.

b)

A pure substance consists of two different types of particles with variable composition

c)

A pure substance consists of many types of particles and different composition

24.

In a sugar solution water is_____ and sugar is_____

a)

water is solute and sugar is solvent

b)

water solute and as well as solvent

c)

water is solvent and sugar is solute

25.

What is meant by chromatography?

a)

The process of separation of volatile and non volatile mixtures is called chromatography.

b)

The process of separation of components of a mixture based on its solubility is called chromatography

c)

The process of separation based on its solubility is called chromatography

26.

The method used in washing machines to squeeze out water from wet clothes

a)

Sublimation

b)

Distillation

c)

Centrifugation

27.

When a saturated solution is heated and more solute is dissolved in it, what is such a solution called?

a)

Supersaturated Solution

b)

Colloidal Solution

c)

Aqueous Solution

d)

Thermo Saturated Solution

28.

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.

29.

A mixture will appear translucent in the case of?

a)

Copper sulphate + water.

b)

Alum + water.

c)

Sugar + water.

d)

Starch + water.

30.

Which of the following is an example of heterogeneous substance?

a)

Bottled water.

b)

Table salt.

c)

Pieces of copper.

d)

Candle.

31.

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)

32.

What is the solute in the soda water?

a)

Water

b)

Carbon dioxide

c)

Sugar

d)

Oxygen

33.

how will you seperate oxygen from a mixture of liquid air?

a)

centrifugation

b)

seperating funnel

c)

fractional distillation

d)

distillation

34.

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

35.

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

a)

(a) Evaporation

b)

(b) Precipitation

c)

(c) Condensation

d)

(d) Sublimation

36.

Which of the following elements is not a metalloid?

a)

(a) Boron

b)

(b) Silicon

c)

(c) Germanium

d)

(d) Tungsten

37.

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

38.

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

39.

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.

40.

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

a)

Mixture.

b)

Compound.

c)

Solution.

d)

Colloid.

41.

A mixture of two or more metals or a metal and non-metal is known as

a)

Pure compound

b)

Heterogeneous mixture

c)

Alloy

d)

Pure solid

42.

Sodium carbonate is

a)

an element

b)

a compound

c)

a mixture

d)

None of these

43.

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

44.

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

a)

True solution

b)

Homogenous solution

c)

Colloid

d)

all of the above

45.

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

46.

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

47.

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

a)

Oscillation

b)

Tyndall effect

c)

Dispersion

d)

Brownian movement

48.

Colloids can be separated by

a)

filtration

b)

distillation

c)

sedimentation

d)

centrifugation

49.

Burning of a candle is

a)

physical change

b)

chemical change

c)

both physical and chemical change

d)

none of the above

50.
a)

A

b)

B

c)

C

d)

D

51.

Name the flask

a)

round bottom flask

b)

flat bottom flask

c)

conical flask

52.

NAME THE APPARATUS

a)

DISTILLATOR

b)

CONDENSOR

c)

FRACTIONATING COLUM

53.

NAME THE SEPARATION TECHNIQUE

a)

FRACTIONAL DISTILLATION

b)

DISTILLATION

c)

SEPARATING FUNNEL

d)

EVAPORATION

54.

NAME THE PROCESS

a)

DISTILLATION

b)

FRACTIONAL DISTILLATION

c)

EVAPORATION

d)

CONDENSATION

55.

NAME THE SEPARATION TECHNIQUE DISTILLATION

a)

EVAPORATION

b)

DISTILLATION

c)

CONDENSATION

56.

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

4 lines
57.

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

4 lines
58.

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

59.

The process used to separate oil and water is:

a)

Distillation

b)

Sublimation

c)

Separating funnel

d)

chromatography

60.

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

61.

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

62.

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.

63.

.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

64.

Distillation is a good separation technique for:

a)

Solids

b)

Liquids

c)

Solid alloys

d)

Gases

65.

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

66.

The amount of heat which is used to change the state of matter not for increase the temperature is called

a)

Latent heat

b)

Specific heat

c)

Heat capacity

d)

None of the above.

67.

Which of the following will produce severe burns ?

a)

Cold water

b)

Hot water

c)

Boiling water

d)

Steam

68.

Ice floats on water because

a)

it has higher density than water

b)

it has lower density than water due to more volume

c)

it is solid

d)

it is low melting solid

69.

Latent heat of fusion is amount of

a)

heat energy required to change 1 kg solid into liquid completely at its melting point.

b)

heat energy required to convert 1 kg solid into liquid at room temperature

c)

heat energy required to change 1 g of solid into liquid completely

d)

heat energy required to change 1 kg of solid into liquid at any temperature.

70.

When heat is constantly supplied by a burner to boiling water, then the temperature of water during vapourisation

a)

Rises very slowly

b)

Rises rapidly until steam is produced

c)

First rises and then becomes constant

d)

Does not rise at all

71.

When water at 0°C freezes to form ice at the same temperature of 0°C, then it

a)

Absorbs some heat

b)

Releases some heat

c)

Neither absorbs nor releases heat

d)

Absorbs exactly 3.34 x 105J/kg of heat

72.

A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following will correctly represent the result.

a)
b)
c)
d)
73.

In which form, do the water molecules have less kinetic

energy?

a)

(a) Ice

b)

(b) Water

c)

(c) Steam

d)

(d) All of them have equal kinetic energy

74.

Which of the following has highest kinetic energy?

a)

(a) Particles of ice at 0 degree C

b)

(b) Particles of water at 0 degree C

c)

(c) Particles of water at 100 degree C

d)

(d) Particles of steam at 100 degree C

75.

235K = _________°C

a)

38

b)

-20

c)

20

d)

-38

76.

At what temperature liquid water and steam co-exist?

a)

At the melting point of ice

b)

At the boiling point of water

c)

At the freezing point of water

d)

At the condensation point

77.

Melting point of ice is

a)

273.16K

b)

373.15K

c)

100°C

d)

250.18K

78.

The S.I unit of temperature is:

a)

Celsius

b)

Fahrenheit

c)

Kelvin

d)

None

79.

On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be:

a)

33°C, 56°C and 118°C

b)

35°C, 56°C and 119°C

c)

35°C, 56°C and 118°C

d)

56°, 119°C and 35° C

80.

When water at 0°C freezes to form ice at the same temperature of 0°C, then it:

a)

Absorbs some heat

b)

Neither absorbs nor releases heat

c)

Absorbs exactly 3.34 x 105J/kg of heat

d)

Releases some heat

81.

When a solid is heated it's particles begin to vibrate with energy

a)

true

b)

false

82.

Which of the following represented latent heat of fusion in PPT?

a)
b)
c)
d)
83.

Which of the following represented latent heat of vapourization in PPT?

a)
b)
c)
d)
84.

Latent heat of vapourisation is amount of

a)

heat energy required to change 1 kg liquid into vapours completely at its melting point.

b)

heat energy required to convert 1 kg solid into liquid at room temperature

c)

heat energy required to change 1 kg liquid into vapours completely at its boiling point.

d)

heat energy required to change 1 kg of solid into liquid at any temperature.

85.

20. For you, individually do you get an any better understanding of topics with my animations?

Answer Honestly with a little thinking.

a)

Yes

b)

No

c)

It actually confuses me even more.

d)

I don't know.

86.

Which one of the following is an example of a fluid?

a)

Oxygen

b)

Carbon

c)

Phosphorus

d)

Sulphur

87.

235K = _________°C

a)

38

b)

-20

c)

20

d)

-38

88.

Which of the following statements is NOT true?

a)

The molecules in a liquid and a gas can flow.

b)

The molecules in a liquid are arranged in a regular pattern.

c)

The molecules in a gas move about randomly at high speed.

d)

The molecules in a solid vibrate about a fixed position

89.

Name the process by which dry ice changes into carbon dioxide gas.

a)

Evaporation

b)

Condensation

c)

Sublimation

d)

Vaporisation

90.

At what temperature liquid water and steam co-exist?

a)

At the melting point of ice

b)

At the boiling point of water

c)

At the freezing point of water

d)

At the condensation point

91.

Melting point of ice is

a)

273.16K

b)

373.15K

c)

100°C

d)

250.18K

92.

Which of the following undergoes sublimation?

a)

Sodium chloride

b)

Potassium chloride

c)

Ammonium sulphate

d)

Ammonium chloride

93.

In which of the following conditions, the distance between the molecules of hydrogen gas would decrease?

a)

Increasing the pressure on hydrogen in a closed container

b)

Increasing the volume of the container of hydrogen gas

c)

Heating the container

d)

Some hydrogen gas leaking out of container

94.

Which one among the followings has a fixed volume but no fixed shape?

a)

Carbon dioxide

b)

Ice

c)

Kerosene

d)

Xenon

95.

A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following is the correct arrangement?

a)

oxygen – honey – sugar

b)

oil – air– salt

c)

juice – salt – oxygen

d)

salt – air – sugar solution

96.

which of the following is matter

a)

air

b)

stone

c)

cloud

d)

all of them

97.

the 'panch tatva' or five basic elements are air,water,fire,earth and ___________?

a)

trees

b)

animals

c)

sky

d)

moon

98.

what do you think?

matter is continuous or particulate

a)

continuous

b)

particulate

99.

when 2-3 crystals of potassium permanganate are dissolved in water, the colour of water will be

a)

blue

b)

green

c)

yellow

d)

purple pink

100.

what is the chemical formula of potassium permanganate

a)

PPM

b)

KMn

c)

KMnO

d)

KMnO4

101.

do you think particles of matter have spaces between them?

a)

yes

b)

no

102.

do you think the particles of matter are continuously moving?

a)

yes

b)

no

103.

when 2-3 crystals of copper sulphate is added to a glass of water ,the colour developed is

a)

blue

b)

green

c)

red

d)

yellow

104.

what is the chemical formula of copper sulphate

a)

CuS

b)

CoSO4

c)

CuSO3

d)

CuSO4

105.

as the temperature rises, particles of matter move

a)

fast

b)

slow

c)

not effected

d)

none of them

106.

intermixing of two different types of matter on their own is called:

a)

fusion

b)

diffusion

c)

vaporisation

d)

condensation

107.

Idu-Mishmi dancers are from which part of India?

a)

Andhra Pradesh

b)

Arunachal Pradesh

c)

Himachal Pradesh

d)

Rajasthan

108.

Do particles of matter attract each other

a)

Yes

b)

No

109.

How many states of matter are there?

a)

3

b)

4

c)

5

d)

2

110.

One of them is the fourth state of matter?

a)

Cell Wall

b)

Plasma

c)

Plasma Membrane

d)

Cytoplasm

111.

The fifth state of matter is given by?

a)

Subhash Chandra Bose

b)

Albert Einstein

c)

Satyendra Nath Bose

d)

Both Satyendra Bose and Einstein

112.

The fifth state of matter is called as?

a)

REC

b)

ABC

c)

BAC

d)

BEC

113.

What is the full form of CNG?

a)

Cairo Nitro Gasoline

b)

Car Need Gas

c)

Compressed Natural Gas

d)

Congress Natural Gas

114.

Full form of LPG?

a)

Light Petrol Gas

b)

Liquified Petroleum Gas

c)

Light Purple Gas

d)

Light Paper Glue

115.

The S.I unit of temperature is:

a)

Celsius

b)

Fahrenheit

c)

Kelvin

d)

None

116.

What is the formula of ammonium chloride?

a)

AmCl

b)

NH4Cl

c)

NaCl

d)

MgCl2

117.

The substances which occupy some space and having some mass called

a)

Particles

b)

Impure substance

c)

Ions

d)

Matter

118.

Particles of matter having space between them is called

a)

Interstitial space

b)

Intermolecular space

c)

Vacant space

d)

None of the above

119.

On which factors evaporation does not depend

a)

Humidity

b)

Temperature

c)

Surface area

d)

Quality of matter

120.

The temperature at which vapour pressure of liquid is equal to atmospheric pressure is

a)

Melting point

b)

Freezing point

c)

Boiling point

d)

None of the above

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