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…….helps us to select a suitable reducin...

…….helps us to select a suitable reducing agent and appropriate temrature range for reduction

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An alkali metal hydride (NaH)reacts with diborane in A to give a tetrahedral compound B which is extensively used as reducing agent in organic synthesis. The compounds A and B respectively are,

An element occupies group number 1 and period number 3. This element when exposed to air gives compound (A). The element with water forms compound (B). Which is a strong base und (A) with ammonia gives compound (C ) which is used as reducing agent in organic chemistry. The element reacts with an halogen and forms cooking salt (D). Identify A, B, C and D.

FULL MARKS-METALLURGY -Additional questions -Fill in the blanks
  1. Minerals that contains a high percentage of metal from which it can b...

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  2. …….helps us to select a suitable reducing agent and appropriate temrat...

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  3. If E^(@) is positive ,then the DeltaG is……..

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  4. Chemical formula of cuprite is……..

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  5. Gravity separation is also called as……….

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  6. …….ore is purified by gravity separation process.

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

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

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

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  10. Leaching process is a…….reaction

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  11. Magnesite is calcined to give ……..

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

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

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

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

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

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  17. ………… is purified by zone refining

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

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

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  20. ……….is the most abundant metal.

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