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Name the flux to remove the impurity of ...

Name the flux to remove the impurity of `SiO_(2)`

A

`P_(4)O_(10)`

B

`CaO`

C

`N_(2)O_(5)`

D

`AI_(2)O_(3)`

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The correct Answer is:
B
`CaO` is obtained from carbonate.
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ALLEN-METALLURGY-EXERCISE-02
  1. The reduction of Cr(2)O(3), by heating it with aluminium is known as

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  2. Which metal is leached from its ore by the use of KCN

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  3. Name the flux to remove the impurity of SiO(2)

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  4. Mercury containers are made of

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  5. Autoreduction process is used in the extraction of

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  6. When Alumina is electrolysed in presence of cryolite, the gas liberate...

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  7. In the extraction of copper, metal is formed in the Bessemer converter...

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  8. x,y and z in the following processes are respectively (i) P(2)O(5) +...

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  9. Which of the following process involves smelting

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  10. Out of the following which ores are calcinated during extraction (a)...

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  11. Which of the following match are incorrect

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  12. Valachite on calcination gives rarr 'A' + CO(2) +H(2)O. Compound 'A' o...

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  13. Which of the following ores are calcinared during extraction

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  14. Which method of purification is represented by the following equations...

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  15. Which are correctly is matched

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  16. Which of the following reaction is a part of Serpeck's process

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  17. (xiv) Following equation represents a method of purification of nickel...

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  18. Which substance is used as basic refractory material in furnace

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  19. Carbon cannot be used in the reduction of A1(2)O(3) because:

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  20. Which of the following reaction is not involved in themite process

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