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Sodium cyanide is added to depresses the...

Sodium cyanide is added to depresses the floatation property of ZnS by forming a layer of …….

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`Na_(2)[Zn(CN)_(4)]`-sodium Zincate complex
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Calcium hydroxide reacts slowly with carbon dioxide in air to form a thin layer of ______.

FULL MARKS-METALLURGY -Additional questions -Fill in the blanks
  1. …….ore is purified by gravity separation process.

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  2. In froth floatation process…….acts as a collector

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  3. Sodium cyanide is added to depresses the floatation property of ZnS by...

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  4. The process of gold reduced to its elemental state is called ……..

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  5. Leaching process is a…….reaction

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  6. Magnesite is calcined to give ……..

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  7. A chemical substance that forms an easily fusible slag with gangue is ...

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  8. In the extraction of iron ……..is removed as slag.

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  9. In the extraction of copper……….is removed as slag

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  10. Cr(2)O(3) can be reduced by an……process

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  11. …………is used as a reducing agent for the reduction of chromic oxide

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  12. ………… is purified by zone refining

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  13. In the mond process,impure nickel is heated with …………..compound.

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  14. ………….filament is used to decompose titanium tetraiodide

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  15. ……….is the most abundant metal.

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  16. ……….is used in packing materials for food items.

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  17. …………..is used in the making item of machine

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  18. ………..is used in the manufature of paints ruber and cosmetics.

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  19. ……….is the first metal used by the humans

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  20. ……….. Is used for increasing the efficiency of solar cells and also us...

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