Practice Questions for Physical and Chemical Changes Science Class 8
Iron when alloyed with chromium and nickel forms _______ .
The chemical name for washing soda is _________.
What is the valency of the element / radical in the compound (NH4)3PO4?
Take a test tube with lime water in it. Now, breathe out carbon dioxide into lime water through a straw. When carbon dioxide is passed through lime water, a new substance is formed which makes it milky. Name this white substance?
What is formed when hydrogen burns in oxygen?
Ca + H2O
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