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Explain why : Aluminium cannot be ext...

Explain why :
Aluminium cannot be extracted by reducing alumina with carbon.

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ICSE-METALLURGY-ADDITIONAL QUESTIONS FOR PRACTICE
  1. Explain why : In the electrolysis of molten alumina, the carbon ano...

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  2. Explain why : A layer of powdered coke is sprinkled on the surface...

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  3. Explain why : Aluminium cannot be extracted by reducing alumina wit...

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  4. Explain why : Aluminium is used for making cables for overhead elec...

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  5. Explain why : Conc. nitric acid can be stored in aluminium containe...

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  6. Explain why : Aluminium is used for making cooking vessels.

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  7. Name the steel alloy used for making the following articles. Also stat...

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  8. Name the steel alloy used for making the following articles. Also stat...

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  9. Name the steel alloy used for making the following articles. Also stat...

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  10. State two properties of brass that render it more useful for some purp...

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  11. What is an amalgam ? State its use with an example.

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  12. Name an alloy of :

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  13. Explain the following: A neutral gas other than oxygen is formed at th...

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  14. Complete and balance the following equation : Al2 O3. 2H2 O + NaOH to...

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  15. Complete and balance the following equation : Al2 O3. 2H2 O + NaOH to

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  16. Give the product when Al2 O3. 2H2 O reacts with Sodium hydroxide

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  17. Answer the following questions with respect to the electrolytic reduct...

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  18. Answer the following questions with respect to the electrolytic reduct...

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  19. Answer the following questions with respect to the electrolytic reduct...

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  20. Answer the following questions with respect to the electrolytic reduct...

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