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What would happen to the roadside iron r...

What would happen to the roadside iron railings if they are not pained ? Why does it happen so ?

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BHARATI BHAWAN (ENGLISH)-METALS AND NONMETALS -Very short answer Questions
  1. Write one constituent each of brass and bronze that is not common to b...

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  2. Which two major constituents form th alloy duralumin ?

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  3. What would happen to the roadside iron railings if they are not pained...

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  4. Define vulcanization.

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  5. Name two metals which can displace hydrogen from dil. H(2)SO(4) and tw...

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  6. Name the reducing agent which reduces the iron ore in the blast furnac...

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  7. Does copper react with dilute hydrochloric acid ?

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  8. Which one is more reactive : copper or zinc ?

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  9. Is lead a very good conductor of electricity ?

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  10. Why is silver a costly metal ?

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  11. Name the liquied in which gold dissolves.

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  12. Name one use of sulphur.

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  13. In what respect does graphite resemble a metal ?

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  14. Give reasons why metals are good conductors , whereas nonmetals do not...

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  15. Name two significant properties of a metal.

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  16. Explain why metals replace hydrogen from acids, whereas nonmetals do n...

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  17. Sodium hydroxide should not be stored in aluminium containers. Why ?

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  18. Explain why zinc metal can displace copper from copper sulphate soluti...

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  19. Why is sodium kept under kerosene ?

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  20. Explain why sodium is not found in the native state.

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