Practice Questions for Physical and Chemical Changes Science Class 8
A chemical change occurs when the _____ rearrange themselves.
The formula of sulphuric acid is __________.
A chemical change occurs when chalk powder (calcium carbonate) is heated. The chemical reaction that occurs is represented by the chemical word equation given below.
Zinc + Hydrobromic acid Zinc bromide + Hydrogen
Which is a solid reactant in the above reaction?
Ca + H2O
The representation of a chemical reaction using symbols and formulas of the substances is called __________.
Electric Current and its Effects
Light and Reflection
Structure of Matter
Acids, Bases and Salts
The Air Around Us
Where does Food Come From?
What are the Components of Food?
Properties of Magnets
Motion and Measurement of Distances
Electricity in Daily Life
Changes Around us
Sorting and Classifying Things
Separation of Substances
Fibres, Fabric and Clothing
Lights, Shadows and Reflection
Living Organisms and their Surroundings
The World Around us
Parts and Functions of Plants
Parts and Functions of Animals