Chemistry - 9 Chapter - 4
Periodicity of Elements and Periodic Table
Test - 22

1. Which are the four elements which occur in liquid state at room temperature?




2. Which are the metallic elements which occur in liquid state at room temperature?



3. Which is the only non metallic element which occurs in liquid state at room temperature?




4. A chemical substance that neutralizes acids ____is?




5. A piece of ________ metal darts around the surface of water with hissing sound and producing hydrogen.




6. Alkali is a chemical substance that turns____?


7. Define acid? ( Pick the wrong statement )





8. Oxides of metals are ________ whereas oxides of non-metals are _______ in nature.



9. Oxides of metals are basic in nature and oxides of non metals are ______.



10. Sodium is stored in ______ to avoid its contact with atmospheric
______.



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