Multiple Choice Questions
IS MATTER AROUND US PURE?
Practice Questions with Answers
Total 112 questions available
Q. 1
Identify a homogeneous mixture from the following:
A
Dust stormB
A suspension of chalk in waterC
Soap bubbles formed by blowing air into soap solutionD
A dilute solution of alcohol in waterClick an option to check your answer
Q. 2
At room temperature, a non-metal which is liquid is:
A
FluorineB
SulphurC
BromineD
OxygenClick an option to check your answer
Q. 3
The properties of mixture are _________ from its components.
A
Slightly differentB
Entirely differentC
SimilarD
AverageClick an option to check your answer
Q. 4
State whether the following statement is True or False: Particles of matter are always at rest and never move.
A
FalseB
TrueClick an option to check your answer
Q. 5
How will you separate alcohol from water?
A
By CentrifugationB
By fractional distillationC
By separating funnelD
By sublimationClick an option to check your answer
Q. 6
What phenomenon is responsible for the scattering of light by colloidal particles in a solution?
A
Dispersion effectB
Tyndall effectC
Diffraction effectD
Refraction effectClick an option to check your answer
Q. 7
Cod-liver oil is an example of:
A
True solutionB
Colloidal solutionC
SuspensionD
EmulsionClick an option to check your answer
Q. 8
A Substance can be beaten into sheets and wires. What will you call it?
A
It is both brittle and lustrousB
It is both sonorous and ductileC
It is both malleable and ductileD
It is both malleable and brittleClick an option to check your answer
Q. 9
What is concentration in a solution?
A
Amount of solventB
Total volumeC
Amount of soluteD
Amount of gasClick an option to check your answer
Q. 10
Which property is NOT a characteristic of a solution?
A
Homogeneous mixtureB
Particles do not settle downC
Particles cannot be separated by filtrationD
Particles scatter lightClick an option to check your answer
Q. 11
Which element is liquid at room temperature?
A
IronB
GoldC
MercuryD
SilverClick an option to check your answer
Q. 12
How is the concentration of a solution commonly expressed?
A
Only in gramsB
Only in litersC
In millilitersD
In percentagesClick an option to check your answer
Q. 13
The smell of hydrogen sulfide (H2S) gas:
A
PleasantB
Of rotten eggC
Of burning sulfurD
None of theseClick an option to check your answer
Q. 14
Which of the following is a colloid?
A
Aluminium paintB
BloodC
MilkD
AllClick an option to check your answer
Q. 15
All living creatures need to ____ for survival.
A
runB
sleepC
swimD
breatheClick an option to check your answer
Q. 16
How many naturally occurring elements are there?
A
102B
82C
92D
112Click an option to check your answer
Q. 17
Which of the following is a colloidal solution?
A
Starch solutionB
Copper sulphate solutionC
Kerosene oil and waterD
Chalk powder in waterClick an option to check your answer
Q. 18
Diamond is lustrous because:
A
It is pureB
It is colorlessC
It is hardD
Its refractive index is highClick an option to check your answer
Q. 19
Thermometer is an instrument that measures:
A
Flow energy in a substanceB
Radiation of substanceC
Heat of substanceD
Temperature of substanceClick an option to check your answer
Q. 20
The particles of colloidal solution can be separated by
A
DistillationB
CentrifugationC
FiltrationD
EvaporationClick an option to check your answer
Q. 21
Which of the following statements is true?
A
Homogeneous mixtures can have variable compositionB
Salt solution is heterogeneous mixtureC
Homogeneous mixtures fixed compositionD
Heterogeneous mixtures have fixed compositionClick an option to check your answer
Q. 22
Which of the following is an example of a liquid solution?
A
Soda waterB
Sand and saltC
IceD
AirClick an option to check your answer
Q. 23
What property do metals typically possess?
A
DullnessB
Poor conductivityC
MalleabilityD
FragilityClick an option to check your answer
Q. 24
Which of the following statement is true about compounds?
A
Compound is heterogeneous and has fixed compositionB
Compound is heterogeneous and has no fixed compositionC
Compound is homogeneous and has fixed compositionD
Compound is heterogeneousClick an option to check your answer
Q. 25
Which of the following is an example of a non-metal?
A
OxygenB
SodiumC
IronD
CopperClick an option to check your answer
Q. 26
What is an unsaturated solution?
A
Has no soluteB
Has more solute than saturatedC
Has maximum soluteD
Has less solute than saturationClick an option to check your answer
Q. 27
What is a solution?
A
A mixture of different solidsB
A gas onlyC
A solid mixtureD
A homogeneous mixtureClick an option to check your answer
Q. 28
Which of the following is not true for a mixture?
A
Energy is not given out in the preparation of a mixtureB
A mixture has a fixed melting pointC
The composition of a mixture is variableD
A mixture can be separated into its constituentsClick an option to check your answer
Q. 29
Which of the following is not a compound?
A
Sulphuric acidB
LeadC
Sulphur dioxideD
ChalkClick an option to check your answer
Q. 30
What state of matter do particles in steam have at 373 K?
A
LiquidB
GasC
SolidD
PlasmaClick an option to check your answer
Q. 31
What makes clothes dry faster on a windy day?
A
More sunlightB
Strong windC
Thick cloudsD
Heavy rainClick an option to check your answer
Q. 32
The cause of Brownian movement is
A
Attractive forcesB
Convection currentC
Heat changes in liquid stateD
Impact of molecules of dispersion mediumClick an option to check your answer
Q. 33
Which of the following is a physical change?
A
Burning of natural gasB
Rusting of ironC
Freezing of waterD
Digestion of foodClick an option to check your answer
Q. 34
What is a solid solution called?
A
A suspensionB
An alloyC
A colloidD
A solutionClick an option to check your answer
Q. 35
What is the temperature at which a solid melts to become a liquid called?
A
Freezing pointB
Melting pointC
Evaporation pointD
Boiling pointClick an option to check your answer
Q. 36
Which of the following is not a pure substance?
A
Nitric acidB
MercuryC
Tap waterD
Distilled waterClick an option to check your answer
Q. 37
What do we call a mixture that has the same look and texture all through it?
A
A weird mixtureB
A special mixtureC
A homogeneous mixtureD
A different mixtureClick an option to check your answer
Q. 38
What are the two main components of a solution?
A
Liquid and solidB
Solid and gasC
Solvent and soluteD
Gas and liquidClick an option to check your answer
Q. 39
The element which is a liquid slightly above 300°C is:
A
CesiumB
SodiumC
MagnesiumD
LithiumClick an option to check your answer
Q. 40
Which of the following is not a pure substance?
A
SugarB
SaltC
MercuryD
BloodClick an option to check your answer
Q. 41
Clouds and fogs are an example of
A
Gas in liquid solutionB
Gas in solid solutionC
Gas in gas solutionD
Liquid in gas solutionClick an option to check your answer
Q. 42
Find the incorrect statement:
A
No energy changes occur when the constituents of air try to be mixed.B
Purity of compounds can be tested by determining their melting points.C
Cesium and gallium are liquids above 300°C.D
Mixture can be called a single substance.Click an option to check your answer
Q. 43
How is solubility defined?
A
Maximum solute in solutionB
Concentration of the solventC
Amount of solventD
Total solution volumeClick an option to check your answer
Q. 44
A hard substance when bent produces a tinkling sound. Predict its nature.
A
Non-metalB
MetalC
CompoundD
All of theseClick an option to check your answer
Q. 45
The process of separation of insoluble solids from a liquid is called:
A
FiltrationB
DecantationC
CrystallisationD
EvaporationClick an option to check your answer
Q. 46
What property of matter allows the smell of hot cooked food to reach us quickly?
A
High rigidityB
Fast diffusionC
Low densityD
High compressibilityClick an option to check your answer
Q. 47
A combination of common salt and iron filings is a:
A
MixtureB
ElementsC
CompoundD
Both A and BClick an option to check your answer
Q. 48
What happens to the temperature of a substance during the melting process?
A
It remains constantB
It increases continuouslyC
It fluctuates unpredictablyD
It decreases continuouslyClick an option to check your answer
Q. 49
State whether the following statement is True or False: Evaporation happens faster with an increase in wind speed.
A
TrueB
FalseClick an option to check your answer
Q. 50
What does the activity with potassium permanganate and water show us about matter?
A
That matter can change color easilyB
That there are many tiny particles in matterC
That matter can disappear completelyD
That matter is always solidClick an option to check your answer
Q. 51
When iron and sulphur are heated at high temperature
A
Yellow coloured iron sulphideB
Black coloured FeS is formedC
They do not heatD
Mixture of iron and sulphurClick an option to check your answer
Q. 52
Which of the following substances is a compound?
A
WaterB
HeliumC
IronD
OxygenClick an option to check your answer
Q. 53
Which of the following has the highest solubility at 293 K?
A
NaClB
KNO3C
NH4ClD
KClClick an option to check your answer
Q. 54
Which one is a physical change?
A
Mixing BaSO4 + NaClB
Adding NaCl to waterC
Burning magnesium in airD
Mixing NH3 and HClClick an option to check your answer
Q. 55
What is the name given to the liquid which contains suspended particles?
A
Collided solutionB
SuspensionC
True solutionD
All of theseClick an option to check your answer
Q. 56
Nanometer is an:
A
Unit for measuring micro-distanceB
Instrument used for measuring micro-distanceC
Unit for measuring macro-distanceD
Instrument used for measuring macro-distanceClick an option to check your answer
Q. 57
Which of the following has the smell of rotten egg?
A
Copper SulphideB
Hydrogen SulphideC
Calcium SulphideD
Iron SulphideClick an option to check your answer
Q. 58
Which gas is the main component of air?
A
Carbon dioxideB
NitrogenC
HeliumD
OxygenClick an option to check your answer
Q. 59
Which of the following statements is uncommon for both elements and compounds?
A
They are homogeneousB
They are commonly found free in natureC
They are the simplest form of matterD
They can be broken down into simpler substancesClick an option to check your answer
Q. 60
Which method measures concentration as mass by mass percentage?
A
Mass of solute divided by massB
Volume of solute divided by massC
Mass of solution divided by volumeD
Mass of solute divided by volumeClick an option to check your answer
Q. 61
What is the effect of temperature on solubility?
A
It remains the sameB
It can increase or decreaseC
It only affects liquidsD
It only affects solidsClick an option to check your answer
Q. 62
Which of the following statement is always true when a substance undergoes physical change
A
A new substance is formedB
It changes colourC
Its composition remains the sameD
It boilsClick an option to check your answer
Q. 63
A shining thick liquid is often used in glass thermometers. Name it.
A
BromineB
MercuryC
GalliumD
CalciumClick an option to check your answer
Q. 64
How small are the particles in a solution?
A
Larger than 1 mmB
Smaller than 1 nanometerC
Between 1 mm and 1 cmD
Exactly 1 meterClick an option to check your answer
Q. 65
The size of particles of true solutions is
A
> 1000 nmB
< 1 nmC
> 100 nmD
Between 1 nm to 100 nmClick an option to check your answer
Q. 66
The particles of suspension
A
Can’t be seen with naked eyeB
Can be seen with naked eyeC
Can’t be seen with powerful microscopeD
Can’t be seen with electron microscopeClick an option to check your answer
Q. 67
Which of the following is heterogeneous?
A
AirB
SmokeC
Stainless steelD
BrassClick an option to check your answer
Q. 68
What is solubility?
A
Solid stateB
Maximum solute in a solventC
Ability to evaporateD
Amount of soluteClick an option to check your answer
Q. 69
Which of the following are chemical changes?
A
Melting of iceB
Freezing of waterC
Drying of wet clothes in sunlightD
Cooking of vegetablesClick an option to check your answer
Q. 70
State whether the following statement is True or False: Matter is made up of particles that keep dividing into smaller particles.
A
FalseB
TrueClick an option to check your answer
Q. 71
State whether the following statement is True or False: On increasing the temperature of solids, the particles start vibrating with greater speed.
A
FalseB
TrueClick an option to check your answer
Q. 72
Which one is NOT an element?
A
MetalsB
Non-metalsC
AlloysD
Semi-metalsClick an option to check your answer
Q. 73
A compound is a _______ substance made up of _______.
A
impure; two or more simpler substancesB
hard; only one elementC
pure; two or more elementsD
soft; only one kind of atomsClick an option to check your answer
Q. 74
Which of the following can be separated by filtration?
A
SolutionB
SuspensionC
ColloidD
All of the aboveClick an option to check your answer
Q. 75
When a beam of light passes through a colloidal solution, it gets.
A
AbsorbedB
ScatteredC
ReflectedD
RetractedClick an option to check your answer
Q. 76
Air shows the property of:
A
N2B
O2C
Both N2 and O2D
None of theseClick an option to check your answer
Q. 77
Kerosene oil and water can be separated by
A
DistillationB
CentrifugationC
Separating funnelD
EvaporationClick an option to check your answer
Q. 78
What is the main characteristic of liquids?
A
They can change their shapeB
They have a definite shapeC
They are always rigidD
They don't have a fixed volumeClick an option to check your answer
Q. 79
Statement A: Brass is a solution while gun powder is not. Statement B: Air represents a solution in terms of science. Which of the two statements is true?
A
Statement BB
Statement AC
Both A and BD
Neither A nor BClick an option to check your answer
Q. 80
What is a physical change?
A
Change in compositionB
Change in appearanceC
Change in stateD
All of the aboveClick an option to check your answer
Q. 81
40 g of common salt is dissolved in 320 g of water. The mass percentage of salt is
A
10%B
15%C
11.1%D
12.5%Click an option to check your answer
Q. 82
What happens when you pour acetone on your palm?
A
evaporateB
freezeC
solidifyD
disappearClick an option to check your answer
Q. 83
State whether the following statement is True or False: All solids have a definite shape, distinct boundaries, and fixed volumes, making them easy to compress.
A
TrueB
FalseClick an option to check your answer
Q. 84
How does the rate of diffusion of gases compare to that of liquids and solids?
A
Gases diffuse slower than liquids and solidsB
Gases diffuse faster than liquids and slower than solidsC
Gases diffuse faster than both liquids and solidsD
Gases and liquids diffuse at the same rateClick an option to check your answer
Q. 85
1 carat of diamond is equal to:
A
95% mgB
91% goldC
100 gD
200 mgClick an option to check your answer
Q. 86
What are metalloids?
A
Poor conductorsB
Elements with metallic propertiesC
Gaseous elementsD
Elements with no propertiesClick an option to check your answer
Q. 87
What is a characteristic of a colloidal solution?
A
Settles upon standingB
Completely transparentC
Scatters lightD
Visible particlesClick an option to check your answer
Q. 88
In a pure substance, all the constituent particles are the same in their ____ nature.
A
BiologicalB
PhysicalC
StructuralD
ChemicalClick an option to check your answer
Q. 89
What does the solvent do in a solution?
A
Settles at the bottomB
Adds flavorC
Changes colorD
Dissolves the soluteClick an option to check your answer
Q. 90
What is a dilute solution?
A
No soluteB
High amount of soluteC
Low amount of soluteD
Equal amounts of solute and solventClick an option to check your answer
Q. 91
What does a concentrated solution contain?
A
Little soluteB
Large amount of soluteC
Equal parts solute and solventD
No soluteClick an option to check your answer
Q. 92
What is a chemical change?
A
Change in appearanceB
Physical changeC
No changeD
Change in compositionClick an option to check your answer
Q. 93
The process of change of a solid state into a liquid state is known as _____.
A
DepositionB
VaporizationC
FusionD
SublimationClick an option to check your answer
Q. 94
Which out of the following is a heterogeneous mixture?
A
Iodised table saltB
BrassC
SteelD
AirClick an option to check your answer
Q. 95
What happens in a saturated solution?
A
Solute evaporatesB
Solvent evaporatesC
No more solute can dissolveD
More solute can dissolveClick an option to check your answer
Q. 96
A solution is a ______ mixture of two or more substances.
A
OpaqueB
HomogeneousC
TransparentD
HeterogeneousClick an option to check your answer
Q. 97
What is the primary reason for ice floating on water?
A
Ice dissolves slowly in waterB
Ice is a liquid at room temperatureC
Ice has a lower density than waterD
Ice has a higher density than waterClick an option to check your answer
Q. 98
Which of the following is not a mixture?
A
BloodB
Soap solutionC
CoalD
Carbon dioxideClick an option to check your answer
Q. 99
Kinetic energy of molecules is directly proportional to
A
TemperatureB
PressureC
Both (a) and (b)D
Atmospheric pressureClick an option to check your answer
Q. 100
Which of the following is an example of a solid in a liquid colloid?
A
Shaving creamB
SmokeC
Milk of magnesiaD
FogClick an option to check your answer
Q. 101
State whether the following statement is True or False: A suspension is a mixture where solute particles dissolve completely in the liquid.
A
TrueB
FalseClick an option to check your answer
Q. 102
Which of the following is a liquid metal?
A
CopperB
MercuryC
SilverD
BromineClick an option to check your answer
Q. 103
What do we call the change of state directly from solid to gas?
A
SublimationB
FreezingC
MeltingD
EvaporationClick an option to check your answer
Q. 104
Particles of matter have ____ between them.
A
spaceB
fireC
airD
waterClick an option to check your answer
Q. 105
What type of solution is lemonade?
A
Gas in gasB
Liquid in liquidC
Gas in liquidD
Solid in liquidClick an option to check your answer
Q. 106
Why don’t solutions scatter light?
A
Particles are too largeB
Particles are too smallC
Solutions absorb lightD
Solutions reflect lightClick an option to check your answer
Q. 107
Which of the following is an example of a saturated solution?
A
Saltwater with undissolved saltB
Saltwater with no visible saltC
Sugar water with no sugarD
Clear waterClick an option to check your answer
Q. 108
4 g of solute are dissolved in 36 g of water. What is the mass percent of the solution?
A
100%B
10%C
5%D
20%Click an option to check your answer
Q. 109
What happens to the particles in a solution over time?
A
They evaporateB
They mix evenlyC
They freezeD
They settleClick an option to check your answer
Q. 110
Everything in this universe is made up of material which scientists have named _____.
A
AirB
ElementsC
MatterD
EnergyClick an option to check your answer
Q. 111
What is the percentage of fat present in milk of full cream?
A
6.0 %B
1.5 %C
3.0 %D
4.0 %Click an option to check your answer
Q. 112
What keeps the particles of matter together?
A
GravityB
Force of attractionC
ElectricityD
WaterClick an option to check your answer
Master this Topic
Complete all questions to strengthen your understanding