A change in which a substance undergoes changes in its physical properties is called _____
Chemical change
Physical change
No change
Biological change
When carbon dioxide is passed through lime water, then lime water becomes
Milky
Shiney
Silvery
Golden yellow
Brown colour of the apple after cutting is a
Physical change
Chemical change
No change
Biological change
Ozone layer protects us from harmful
Ultraviolet radiation
Infrared radiation
Visible radiation
Heat radiation
When liquid is cooled down, it changes to solid. This process is known as
Melting
Freezing
Condensation
Sublimation
One or more new substances are formed due to
Chemical changes
Physical changes
Biological changes
State Variations
A sheet of paper was torn into pieces and then burnt.What changes does this sheet of paper undergo?
Chemical change
Physical change
Biological change
Both physical and chemical change respectively
Salt is obtained by the ___________ of sea water.
Evaporation
Neutralisation
Galvanisation
Amalgamation
All chemical changes are permanent and ________
Irreversible
Reversible
Temporary
Basic
When magnesium ribbon is burnt in oxygen, the product obtained is
Magnesium chloride
Magnesium sulphate
Magnesium oxide
Iron chloride
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