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1. Which property of metals is responsible for their shining surface?

2. The most malleable metals are:

4. Which metal is the most ductile?

5. School bells are made of metals because they are:

6. Which metal is liquid at room temperature?

7. Which alkali metals can be easily cut with a knife?

8. Which non-metal is lustrous?

9. The hardest natural substance known is:

10. Which allotrope of carbon is a good conductor of electricity?

11. Gallium and caesium are metals with:

12. Amphoteric oxides react with:

13. Which is the best conductor of heat among metals?

14. Which metal is a poor conductor of heat?

15. Sodium and potassium are stored in kerosene oil because:

16. Which metal does not burn on heating but its filings burn vigorously?

17. The black coating formed on copper when heated in air is:

18. Aluminium develops a thin oxide layer which protects it from:

19. The process of thickening aluminium oxide layer by electrolysis is called:

20. Which metals react vigorously with cold water and catch fire?