WorksheetsPHYSICAL & CHEMICAL CHANGES
Total questions: 20
Worksheet time: 20mins
We are able to see steam rising and droplets of water from the boiling water due to the process of
condensation and precipitation
evaporation and precipitation
only due to precipitation
evaporation and condensation
none of these
Crystal is Writing About Physical Change. Read The Following Sentences And Choose The Incorrect One And Help Her:
Evaporation and condensation are the example of physical change.
There may be some changes in the physical properties such as state, colors, smell etc.
The physical change is usually permanent.
Which of the following is an example of physical change?
A bud turning into a flower
Rusting of iron
Boiling of water
Ripening of a tomato
A change in which the original substance can be obtained back by change of conditions is called:
reversible change
physical change
only a
only b
Brown color of the apple after cutting is ( THINK TWICE BEFORE ANSWERING )
Physical change
Chemical change
No change
Change in state of matter
What will happen if carbon dioxide gas is passed through lime water ?
Calcium carbonate is formed
The lime water turns milky
Both of these
None of these
For rusting, the presence of both oxygen and water is essential
true
false
Chemical name of baking soda
Sodium bicarbonate
Sodium hydrogencarbonate
Both A and B
Magnesium Oxide
The process of depositing a layer of zinc on iron is called
Galvanisation
Crystallisation
Photosynthesis
Evaporation
What is the nature of magnesium oxide solution?
Basic
Neutral
Acidic
Oxygen is same as Ozone
true
false
Which of these is a method to prevent rusting
Washing the items everyday
Use a brush to wipe it everyday
Apply a coat of paint or grease
Keep them in oxygen rich air and water
Which of the following are true when milk changes into curd?
(i) Its state is changed from liquid to gaseous.
(ii) it changes to water.
(iii) It changes to ice.
(iv) The change cannot be reversed.
i
ii
iii
iv
A blue deposit is formed on an iron nail when dipped in copper sulphate solution.
True
False
The reaction of copper sulphate with iron, produces
iron oxide and copper
iron sulphate and copper oxide
iron sulphate and copper
iron sulphate only
Explosion of firework is a
Physical change
Chemical change
What is the color of the flame when magnesium is burnt?
White
Pink
Cream
Yellow
Name the color of the solution when iron nails are dipped in the solution of copper sulphate.
Blue
White
Green
Red
Name the color of copper sulphate solution.
Blue
Green
Pink
White
What acts as a natural shield against ultraviolet radiation
Sun
Mesosphere
Troposphere
Ozone
