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……….is the first metal used by the human...

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

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Copper
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FULL MARKS-METALLURGY -Additional questions -Fill in the blanks
  1. The process of gold reduced to its elemental state is called ……..

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  2. Leaching process is a…….reaction

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  3. Magnesite is calcined to give ……..

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

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

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

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

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

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  9. ………… is purified by zone refining

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

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

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  12. ……….is the most abundant metal.

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

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

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

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

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

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  18. ………ore is concentrated by froth floatation process.

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  19. Zinc blende is concentrated by….. Process

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  20. Gold ore is leached by adding of ……….

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