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Aluminium occurs in combined state where...

Aluminium occurs in combined state whereas gold is found in free state in nature. Why?

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Moderately reactive metals (such as aluminium) are found in combined state in nature. Less reactive metals (such as gold) are found in free state in nature.
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TARGET PUBLICATION-METALLURGY-ANSWER THE FOLLOWING
  1. Why are ionic compounds solid and hard at room temperature?

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  2. Give examples of any two metals which are generally found in the free ...

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  3. Aluminium occurs in combined state whereas gold is found in free state...

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  4. Explain the terms : Metallurgy

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  5. Explain the terms : Ores

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  6. Explain the terms : Minerals

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  7. Explain the terms : Gangue

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  8. Write a short note on concentration of ores.

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  9. Label the diagram given below and explain it

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  10. Explain hydraulic separation method with neat and labelled diagram

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  11. A tapping vessel opens in a tank like container that is tapering on th...

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  12. Describe magnetic separation method with the help of labelled diagram....

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  13. With neat and labelled diagram, explain froth floatation method.

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  14. What is the difference between magnetic separation method and froth fl...

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  15. Write a short note on leaching.

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  16. Name the chemical process used for obtaining a metal from its oxide.

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  17. Answer the following in one or two sentences What is the electronic...

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  18. Write a short note on: Extraction of highly reactive metals.

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  19. Give four examples of highly reactive metals.

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  20. Write the electrode reaction for electrolysis of molten magnesium chlo...

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