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Of what property, are metals used in jew...

Of what property, are metals used in jewellery?

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MBD-MATERIALS: METALS AND NON-METALS-EXAMPLE
  1. Why do sodium , zinc, magnesium and aluminium not occur in their pure...

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  2. Name atleat two metals which do not react with air, water and acids.

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  3. Of what property, are metals used in jewellery?

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  4. What is the colour of copper metal?

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

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

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  7. Why is Potassium metal not stored in water?

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

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

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  10. Why is sodium kept immersed in kerosene oil?

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  11. Explain the following: Acidic oxides

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  12. Explain the following: Basic ocides

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  13. Explain the occurrence of metals in nature.

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

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

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

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

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

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

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

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