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What is the difference between a metal a...

What is the difference between a metal and a non-metal? What is the total number number of naturally occurring element?

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MBD-MATERIALS: METALS AND NON-METALS-EXAMPLE
  1. What is the colour of copper metal?

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  2. Name two metals which can be cut with a knife

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  3. What is the difference between a metal and a non-metal? What is the to...

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  4. Why is Potassium metal not stored in water?

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  5. State two physical properties on the basis of which metals may be dist...

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  6. State one chemical property which may be used to distinguish a metal f...

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  7. Why is sodium kept immersed in kerosene oil?

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  8. Explain the following: Acidic oxides

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  9. Explain the following: Basic ocides

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  10. Explain the occurrence of metals in nature.

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  11. What do you understand by ductility and malleability of a metal? Give ...

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  12. Silver does not combine easily with oxygen but silver jewellery tarnis...

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  13. Why do gold ornaments look new even after several years of use?

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  14. Magnesium and copper metals are heated directly over a flame. Which of...

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  15. CuSO4 + Fe rarr FeSO4 +Cu feSO4 + Zn rarr ZnSO4 + Fe br> On the basi...

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  16. Why are pickles, chutney and citrus fruits not stored in iron and alum...

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  17. what happen when a piece of zinc is added to copper sulphate solution?

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  18. Can copper displace iron from iron sulphate solution? Give reasons.

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  19. Why does aluminium vessel lose its lusture after sometime?

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  20. Why aluminium metal is preferred to copper for making cooking utensils...

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