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WorksheetsPHYSICAL AND CHEMICAL CHANGES
Total questions: 20
Worksheet time: 10mins
What properties can be changed in a phsycial change?
flammibility
shape
size
solubility
Changes of state in matter are
chemical changes
environmental changes
physical changes
not occuring in nature
A chemical change occurs
when the substance changes form
when one or more substances change into a new substance with different properties
when a substance changes shape
when a substance changes color
A change in the color of a substance is
a physical change
a change to a chemical property
an indication of a chemical change
not important to observe
Which one of the following is a reversible change?
Tearing of paper
The water cycle
Breaking of a stick
Baking of a cake
While making a spade, an iron blade is fitted to the wooden handle :
by heating then cooling
by cooling then heating
by melting then cooling
by freezing
Which one of the following statements is correct?
Statement 1: Heating a solution increases the solubility of solute.
Statement 2: Heating of a saturated solution leads to dissolution of more
solute in it.
Only statement 1 is correct
Only statement 2 is correct
Both statements 1 and 2 are correct
Neither statement 1 nor statement 2 are correct
Rusting of iron is an example of a:
reversible change
fast change
slow change
physical change
Which of the following changes can be reversed?
Raw egg to boiled egg
Ice to water
Bud to flower
Cow dung to biogas
Identify the type of reversible change.
Water vapour to Liquid water
melting
boiling
condensation
evaporation
What change will happen to the slices of potato if they will be exposed to oxygen in the air?
Color will change from brown to white
The color will not change
Color will change from white to brown
No changes in color
What causes the rusting of iron nails or iron made materials in a wet cloth?
absence of oxygen
absence of heat
presence of heat
presence of oxygen
Which of the following is an example of chemical change?
A. Taking a glass of water and freezing it by placing it in the freezer.
B. A plant collecting sunlight and turning it into food.
C. Your dog ripping up your homework.
D. Filling up a balloon with hot air.
A vanilla ice cream melts when taken out from a refrigerator for a long time because of heat.
True
False
Charcoal burning on the grill is an example of chemical change.
True
False
Melting ice cubes, boiling water, and drying clothes are examples of physical changes.
True
False
The chemical changes caused by heat are irreversible.
One common example of this is cooked food.
True
False
