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?