WorksheetsPhysical and chemical changes
Total questions: 20
Worksheet time: 5hrs 0mins
It is not dangerous to look at burning magnesium for too long.
True
False
What is the other name for blue vitriol?
Copper sulphate
Magnesium hydroxide
Sulphuric acid
What do carbon dioxide and lime water produce when they react with each other?
CaCO3
MgO
CacO3
CaCO3+water
Chemical name for magnesium hydroxide is :
(a)
Choose the incorrect statement
Ships suffer a lot of damage though they are painted
Stretching of rubber band is a chemical change
Formation of biogas is a chemical change
Burning of candle is both physical and Chemical change
Both b and d
Which of the following is not a physical property of a substance ?
Shape
Color
Density
Flammability
What is galvanisation?
Painting with oil
Process of depositing a layer of zinc on iron
Process of depositing a layer of iron on zinc
Beating aluminium is what kind of change?
Physical change
Chemical change
Formula of rust is :
Fe2o3
Fe2o4
Fe0
Fe2o3.xH2O
Some substances can be obtained in pure state from their solution by the process of :
Galvanisation
Rusting
Crystallisation
What is the colour of Iron sulphate solution?
Blue
Green
Yellow
Red
When carbon dioxide is passed through lime water , it turns ——————-
Green
Blue
Milky white
Brown
Which of the following is not produced during a chemical change?
Sound
Heat
Light
taste
Match the following
i-b;ii-d;iii-e;iv-c;v-a
i-b;ii-d;iii-c;iv-a;v-e
i-b;ii-d;iii-e;iv-a;v-c
i-d;ii-b;iii-e;iv-a;v-c
Iron Pillar Near The Qutub Minar In Delhi Is Famous For The Following Facts. Which Of These Facts Is Responsible For Its Stability?
It is more than 7 metre height
It weighs about 6000 kg
It has no rust after such a long period of time.
Boojho Is Writing About Physical Change. Read The Following Sentences And Choose The Incorrect One And Help Him:
Evaporation and condensation sublimation are the example of physical change.
Changes may be permanent.
There may be some changes in the physical properties such as state, colours, smell etc.
Boojho Appeared In Class Test Where He Wrote Some Statements But He Confused To Know The Incorrect Statement. Would You Help Him To Know That?
In a chemical change heat, light or both are generally given out or absorbed.
Iron utensils when exposed to moist air get gradually coated with reddish brown coating called rust.
A process of separating a pure substance in the form of crystals from the hot saturated solution by cooling is called crystallization.
None of them
Neutralisation is a :
Physical change
Chemical change
Both
None of them
Which is the formula of ozone?
Fe2O3
CaCO3
O2
O3
Which characteristic best describes a physical change?
Composition changes
Composition does not change
State stays the same
Non of these
