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msm 9 quiz 1

Total questions: 180

Worksheet time: 2hrs 35mins

Name
Class
Date
1.

What are unicellular organisms?

a)

Having single cell

b)

Having two cells

c)

Having 3 cells

d)

None of the above

2.

What is the example of unicellular organism?

a)

Amoeba

b)

Bacteria

c)

Paramocium

d)

All of the above

3.

Fundamental unit of life is

a)

Cell

b)

Membrane

c)

Organism

d)

None

4.

Which of the following are examples of Prokaryotes

a)

Algae

b)

Fungi

c)

Bacteria

d)

Protozoa

5.

Identity the image :

a)

Telescope

b)

Compound microscope

c)

Microwave

d)

Toaster

6.

Name the type of cell:

a)

Bone cell

b)

Muscle cell

c)

Heart cell

d)

Nerve cell

7.

Who discovered the nucleus of the cell?

a)

Robert Hooke

b)

Robert Brown

c)

Leeuwenhoek

d)

Purkinje

8.
Plants and Animal cell both have this organelle.
a)
Chlorophyll
b)
Chloroplast
c)
Nucleus
d)
Cell Wall
9.

The term 'cell' was given by:

a)

Leeuwenhoek

b)

Robert Hooke

c)

Flemming

d)

Robert Brown

10.

Which of the following has an irregular or variable shape?

a)

Euglena

b)

Paramecium

c)

Amoeba

d)

Clamydomonas

11.

An organism made of one cell is called

a)

multicellular

b)

unicelluar

12.

Organisms made of many cells are called

a)

multicellular

b)

unicellular

13.

Cells that are microscopic mean they are tiny/small.

a)

True

b)

False

14.

Bacteria are each composed of one cell that does not have a membrane-bound organelle. What two terms characterize bacteria?

a)

Multicellular and Prokaryotic

b)

Unicellular and Prokaryotic

15.

Which statement is true about cell theory?

a)

Cell theory states that all cells are non­living.

b)

Cell theory states that cells can come from non­living

things.

c)

Cell theory states that all cells arise from other cells.

d)

Cell theory says animal cells are the only type of

living cells.

16.

Bacteria are examples of

a)

Prokaryotic cells

b)

Eukaryotic cells

17.

Animals, plants, fungi, and protists are examples of

a)

Eukaryotic cells

b)

Prokaryotic cells

18.

protein factories of the cell

a)

Ribosomes

b)

Lysosomes

c)

Mitochondria

d)

chloroplasts

19.

ATP - stands for

a)

Adenosine tri phosphate

b)

Adenosine di phosphate

c)

Adenosine phosphate

d)

Add triple phosphate

20.

Which organelle provide turgidity and rigidity to the cell

a)

Endoplasmic Redticulum

b)

Centriole

c)

Mitochondria

d)

Vacuole

21.

The colourless plastids are known as

a)

Chromoplasts

b)

Chloroplasts

c)

Leucoplasts

d)

Protoplasts

22.

Which of the following are examples of Prokaryotes

a)

Algae

b)

Fungi

c)

Bacteria

d)

Protozoa

23.

The barrier between the protoplasm and the outer environment in an animal cell is

a)

Cell wall

b)

Plasma membrane

c)

Nuclear membrane

d)

Cytoplasm

24.

The phenomenon by which cytoplasm of a cell shrinks from the wall is

a)

Osmosis

b)

Plasmolysis

c)

Diffision

d)

Glycolysis

25.

DNA - full form is

(a)  

26.

Schleiden and Schwann (1839) proposed this theory----

(a)  

27.

Each kind of cell organelle has got specific functions to perform . This process is termed as

(a)  

28.

The longest cell in human body is

a)

Red blood cell

b)

Nerve cell

c)

Muscle cell

d)

Fat cell

29.

A prokaryotic cell has

a)

Nucleus, cell membrane, cytoplasm

b)

Nucleus, mitochondria, cell membrane

c)

Nucleoid, cell membrane, ribosomes

d)

Nucleoid, cell wall, mitochondria

30.

When we sprinkle salt on salad, water comes out because of

a)

endosmosis

b)

Exosmosis

c)

Diffusion

d)

None of the above

31.

Cell wall of plant cells chiefly composed of

a)

Phospholipids

b)

Protein

c)

Cellulose

d)

Hemicellulose

32.

Amoeba acquires its food through a process termed as

a)

Endocytosis

b)

Exocytosis

c)

Plasmolysis

d)

Exocytosis and endocytosis both

33.

What is the example of unicellular organism?

a)

Amoeba

b)

Bacteria

c)

Paramocium

d)

All of the above

34.

Identity the image :

a)

Telescope

b)

Compound microscope

c)

Microwave

d)

Toaster

35.

Which statement is true about cell theory?

a)

Cell theory states that all cells are non­living.

b)

Cell theory states that cells can come from non­living

things.

c)

Cell theory states that all cells arise from other cells.

d)

Cell theory says animal cells are the only type of

living cells.

36.
stiff, protective outer layer of plant cells
a)
cell membrane
b)
nuclear membrane
c)
cell wall
d)
cytoplasm
37.
Cell organelles are embedded in
a)
Nucleolus
b)
Cytoplasm
c)
Protoplasm
d)
Mitochondria
38.
 In the given scenario what will happen?  An egg with a dissolved shell is placed in pure water for 48 hours.
a)
Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
b)
The egg will gain water and swell.
c)
The egg will lose water and shrink.
39.
If you looked at red blood cells under a microscope and saw the blood cells exploded, what would you say happened?
a)
The cells were placed in a hypotonic solution.
b)
the solution was isotonic.
c)
The solution was hypertonic.
40.
Prokaryotes and eukaryotes both have
a)
cell membrane and DNA
b)
nucleus
c)
cell wall
41.

I decide what goes in and out of the cell. I am fluid like and found in BOTH plant and animal cells. I am a...

a)

Cell Wall

b)

Cell Membrane

c)

Cytoplasm

d)

Golgi Apparatus

42.
Ideally, your cells should be in a(n) _______ solution
a)
isotonic
b)
hypertonic
c)
hypotonic
d)
isometric
43.

Select the three parts of the cell theory

a)

Cells are the building blocks of life

b)

Scientists worked hard to discover the cell

c)

All life processes take place in cells.

d)

New cells are produced from existing cells

44.

Select the organelle that release energy

a)

mitochondria

b)

nucleus

c)

vacuole

d)

cytoplasm

45.

The image shows a

a)

plant cell

b)

animal cell

c)

mitosis process

46.
Prokaryotes and eukaryotes both have
a)
cell membrane and DNA
b)
nucleus
c)
cell wall
47.
Which of the following is NOT part of the Cell Theory?
a)
All living things are made up of 1 or more cells
b)
All cells come from pre-existing cells
c)
Cells are basic unit of structure for living things
d)
All cells have a nucleus
48.

What distinguishes a plant cell from an animal cell? (How do you tell them apart) Hint: There's 3 ways (Check all 3)

a)

Central Vacuole

b)

Mitochondria

c)

Cell Wall

d)

Ribosomes

e)

Chloroplasts

49.

I am the "waste removal expert" within a cell, removing unwanted material. Like a garbage man, I am a...

a)

Waste Management

b)

Nucleus

c)

Ribosome

d)

Lysosomes

50.

I decide what goes in and out of the cell. I am fluid like and found in BOTH plant and animal cells. I am a...

a)

Cell Wall

b)

Cell Membrane

c)

Cytoplasm

d)

Golgi Apparatus

51.
Which cellular structure in plants is responsible for photosynthesis?
a)
Nucleus
b)
Cell membrane
c)
Mitochondrion
d)
Chloroplast
52.
What characteristic is found in both prokaryotic and eukaryotic cells?
a)
Mitochondrion
b)
ER
c)
Vacuole 
d)
Ribosome
53.

The longest cell in human body is

a)

Red blood cell

b)

Nerve cell

c)

Muscle cell

d)

Fat cell

54.

A prokaryotic cell has

a)

Nucleus, cell membrane, cytoplasm

b)

Nucleus, mitochondria, cell membrane

c)

Nucleoid, cell membrane, ribosomes

d)

Nucleoid, cell wall, mitochondria

55.

When we sprinkle salt on salad, water comes out because of

a)

endosmosis

b)

Exosmosis

c)

Diffusion

d)

None of the above

56.

Cell wall of plant cells chiefly composed of

a)

Phospholipids

b)

Protein

c)

Cellulose

d)

Hemicellulose

57.

Amoeba acquires its food through a process termed as

a)

Endocytosis

b)

Exocytosis

c)

Plasmolysis

d)

Exocytosis and endocytosis both

58.

What is the example of unicellular organism?

a)

Amoeba

b)

Bacteria

c)

Paramocium

d)

All of the above

59.

Identity the image :

a)

Telescope

b)

Compound microscope

c)

Microwave

d)

Toaster

60.

Which statement is true about cell theory?

a)

Cell theory states that all cells are non­living.

b)

Cell theory states that cells can come from non­living

things.

c)

Cell theory states that all cells arise from other cells.

d)

Cell theory says animal cells are the only type of

living cells.

61.
stiff, protective outer layer of plant cells
a)
cell membrane
b)
nuclear membrane
c)
cell wall
d)
cytoplasm
62.
Cell organelles are embedded in
a)
Nucleolus
b)
Cytoplasm
c)
Protoplasm
d)
Mitochondria
63.
 In the given scenario what will happen?  An egg with a dissolved shell is placed in pure water for 48 hours.
a)
Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
b)
The egg will gain water and swell.
c)
The egg will lose water and shrink.
64.
If you looked at red blood cells under a microscope and saw the blood cells exploded, what would you say happened?
a)
The cells were placed in a hypotonic solution.
b)
the solution was isotonic.
c)
The solution was hypertonic.
65.
Prokaryotes and eukaryotes both have
a)
cell membrane and DNA
b)
nucleus
c)
cell wall
66.

I decide what goes in and out of the cell. I am fluid like and found in BOTH plant and animal cells. I am a...

a)

Cell Wall

b)

Cell Membrane

c)

Cytoplasm

d)

Golgi Apparatus

67.
Ideally, your cells should be in a(n) _______ solution
a)
isotonic
b)
hypertonic
c)
hypotonic
d)
isometric
68.

What is the meaning of cell

a)

Honeycomb

b)

a small room

c)

Compound microscope

d)

Selective permeable membrane

e)

A small room

69.

Cell wall of plant cells chiefly composed of

a)

Phospholipids

b)

Protein

c)

Cellulose

d)

Hemicellulose

70.

Well defined nucleus is absent in

a)

Animal cells

b)

Plant cells

c)

Eukaryotic cells

d)

Prokaryotic cells

71.

Cell arises from preexisting cell was stated by

a)

Robert hooke

b)

Hackle

c)

Schleiden

d)

Virchow

72.

Amoeba acquires its food through a process termed as

a)

Endocytosis

b)

Exocytosis

c)

Plasmolysis

d)

Exocytosis and endocytosis both

73.

First living cells were observed by

a)

Robert hooke

b)

Robert Brown

c)

A. V. Leeuwenhoek

d)

R. Virchow

74.

Main difference between animal cell and plant cell is

a)

nutrition

b)

Movement

c)

Respiration

d)

Growth

75.

Organelle without a cell membrane is

a)

Ribosomes

b)

Nucleus

c)

Mitochondria

d)

Chloroplast

76.

Well defined nucleus is absent in

a)

Animal cells

b)

Plant cells

c)

Eukaryotic cells

d)

Prokaryotic cells

77.

Rough endoplasmic reticulum contains

a)

DNA

b)

RNA

c)

cellulose

d)

Ribosome

78.

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.

79.

Which of the following will produce severe burns ?

a)

Cold water

b)

Hot water

c)

Boiling water

d)

Steam

80.

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

81.

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.

82.

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

83.

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

84.

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)
85.

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

86.

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

87.

235K = _________°C

a)

38

b)

-20

c)

20

d)

-38

88.

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

89.

Melting point of ice is

a)

273.16K

b)

373.15K

c)

100°C

d)

250.18K

90.

The S.I unit of temperature is:

a)

Celsius

b)

Fahrenheit

c)

Kelvin

d)

None

91.

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

92.

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

93.

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

a)

true

b)

false

94.

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

a)
b)
c)
d)
95.

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

a)
b)
c)
d)
96.

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.

97.

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.

98.

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

a)

Oxygen

b)

Carbon

c)

Phosphorus

d)

Sulphur

99.

235K = _________°C

a)

38

b)

-20

c)

20

d)

-38

100.

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

101.

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

a)

Evaporation

b)

Condensation

c)

Sublimation

d)

Vaporisation

102.

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

103.

Melting point of ice is

a)

273.16K

b)

373.15K

c)

100°C

d)

250.18K

104.

Which of the following undergoes sublimation?

a)

Sodium chloride

b)

Potassium chloride

c)

Ammonium sulphate

d)

Ammonium chloride

105.

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

106.

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

a)

Carbon dioxide

b)

Ice

c)

Kerosene

d)

Xenon

107.

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

108.

which of the following is matter

a)

air

b)

stone

c)

cloud

d)

all of them

109.

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

a)

trees

b)

animals

c)

sky

d)

moon

110.

what do you think?

matter is continuous or particulate

a)

continuous

b)

particulate

111.

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

112.

what is the chemical formula of potassium permanganate

a)

PPM

b)

KMn

c)

KMnO

d)

KMnO4

113.

do you think particles of matter have spaces between them?

a)

yes

b)

no

114.

do you think the particles of matter are continuously moving?

a)

yes

b)

no

115.

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

116.

what is the chemical formula of copper sulphate

a)

CuS

b)

CoSO4

c)

CuSO3

d)

CuSO4

117.

as the temperature rises, particles of matter move

a)

fast

b)

slow

c)

not effected

d)

none of them

118.

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

a)

fusion

b)

diffusion

c)

vaporisation

d)

condensation

119.

Idu-Mishmi dancers are from which part of India?

a)

Andhra Pradesh

b)

Arunachal Pradesh

c)

Himachal Pradesh

d)

Rajasthan

120.

Do particles of matter attract each other

a)

Yes

b)

No

121.

How many states of matter are there?

a)

3

b)

4

c)

5

d)

2

122.

One of them is the fourth state of matter?

a)

Cell Wall

b)

Plasma

c)

Plasma Membrane

d)

Cytoplasm

123.

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

124.

The fifth state of matter is called as?

a)

REC

b)

ABC

c)

BAC

d)

BEC

125.

What is the full form of CNG?

a)

Cairo Nitro Gasoline

b)

Car Need Gas

c)

Compressed Natural Gas

d)

Congress Natural Gas

126.

Full form of LPG?

a)

Light Petrol Gas

b)

Liquified Petroleum Gas

c)

Light Purple Gas

d)

Light Paper Glue

127.

The S.I unit of temperature is:

a)

Celsius

b)

Fahrenheit

c)

Kelvin

d)

None

128.

What is the formula of ammonium chloride?

a)

AmCl

b)

NH4Cl

c)

NaCl

d)

MgCl2

129.

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

130.

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

131.

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

132.

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.

133.

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

a)

Mixture.

b)

Compound.

c)

Solution.

d)

Colloid.

134.

A mixture will appear translucent in the case of?

a)

Copper sulphate + water.

b)

Alum + water.

c)

Sugar + water.

d)

Starch + water.

135.

Brass is an example of?

a)

Homogeneous compound.

b)

Homogeneous mixture.

c)

Heterogeneous mixture.

d)

Heterogeneous compound.

136.

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

137.

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

a)

<1nm

b)

>1nm

c)

Between 1nm and 100nm

d)

Above 100 nm

138.

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

139.

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

140.

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

a)

23%

b)

26.47%

c)

29.32%

d)

21.11%

141.

How would H2O be classified? Check all that apply.

a)

Atom

b)

Molecule

c)

Compound

142.

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

a)

Atom

b)

Molecule

c)

Compound

143.

What are atoms composed of?

a)

Protons and electrons.

b)

Protons, neutrons, and electrons.

c)

Neutrons and electrons.

d)

Ions, elements, and compounds.

144.
The beginning substances in a chemical reaction are called...
a)
reactants
b)
products
145.

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

146.
Sugar water is a 
a)
solution
b)
suspension
c)
colloid
147.
Milk is a 
a)
solution
b)
suspension
c)
colloid
148.

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

a)

Jelly

b)

Coloured gemstone

c)

Milk

d)

Milky glass

149.

What is the solute in the soda water?

a)

Water

b)

Carbon dioxide

c)

Sugar

d)

Oxygen

150.

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

151.

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

4 lines
152.

What is Tyndall effect?

4 lines
153.

What are the properties of metal?

a)

Malleable

b)

Sonorous

c)

Ductile

d)

Lustre

154.

Suspension can be separated by filtration.

a)

TRUE

b)

FALSE

155.

Solution is a (a)   mixture.

156.

Who is this person?

a)

Robert Boyle

b)

Antoine Lavoisier

c)

John Tyndall

d)

None of the above

157.

What is Pure substance?

4 lines
158.

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.

159.

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

a)

Mixture.

b)

Compound.

c)

Solution.

d)

Colloid.

160.

A mixture will appear translucent in the case of?

a)

Copper sulphate + water.

b)

Alum + water.

c)

Sugar + water.

d)

Starch + water.

161.

Brass is an example of?

a)

Homogeneous compound.

b)

Homogeneous mixture.

c)

Heterogeneous mixture.

d)

Heterogeneous compound.

162.

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

a)

Chromatography

b)

Filtration

c)

Sublimation

d)

Solution

163.

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

164.

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

165.

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

166.

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

a)

<1nm

b)

>1nm

c)

Between 1nm and 100nm

d)

Above 100 nm

167.

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

168.

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

169.

Sodium carbonate is

a)

an element

b)

a compound

c)

a mixture

d)

None of these

170.

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

171.

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

a)

True solution

b)

Homogenous solution

c)

Colloid

d)

all of the above

172.

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

173.

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

174.

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

a)

Oscillation

b)

Tyndall effect

c)

Dispersion

d)

Brownian movement

175.

Colloids can be separated by

a)

filtration

b)

distillation

c)

sedimentation

d)

centrifugation

176.

Burning of a candle is

a)

physical change

b)

chemical change

c)

both physical and chemical change

d)

none of the above

177.
a)

A

b)

B

c)

C

d)

D

178.

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

179.

Sodium carbonate is

a)

an element

b)

a compound

c)

a mixture

d)

None of these

180.

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

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