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WorksheetsGrade 7 Chemistry chapter 1 &2
Total questions: 25
Worksheet time: 13mins
The examples of physical changes
Cutting of paper
Breaking of a glass tumbler
Burning of fuels
Making soda water by dissolving carbon dioxide
Though Ice and water look difference, they are both made of (a) molecules
No new substance is formed in physical change
True
False
The changes in which a substance undergoes a change in its (a) properties are called physical changes
Changes based on repetition
Reversible change
Irreversible change
Periodic change
Non periodic change
Water and steam look different they are both made of (a) molecules
Some naphthalene balls are kept in stored woollen and silk clothes to protect them from the attack of _________ and ________
Moths
Animals
Plants
Insects
The substances which undergo sublimation
Ammonium chloride
Iodine
Camphor
Naphthalene balls
A physical change is a ________ Change
Periodic
Desirable
Reversible
Slow
Souring of milk is a (a) change
Changes that repeat after a fixed interval of time
Non periodic change
Periodic change
Reversible change
Irreversible change
An irreversible change takes place when
Salt is added to water
Charcoal burns
Ice melts
An iron nail is magnetized
It rained yesterday, but today there are no puddles left on the ground. What process caused this to happen?
condensation
vaporization
sublimation
deposition
Which physical property is the most helpful to determine if water is water?
Mass of the liquid
Boiling point of the liquid
Color of the liquid
Volume of the liquid
Baking a cake is an example of
Physical Change (Just changed phases)
Chemical Change (can't change it back)
The opposite phase of melting is
Condensation
Vaporization
Sublimation
Freezing
Select 2 physical changes.
Ice melting
Wood burning
Metal rusting
Breaking a glass
