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Non-removable impurities during ore conc...

Non-removable impurities during ore concentration is called.........
(Gangue ,Flux , slag)

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Gangue
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What are gangue, flux and slag?

Nature of some ores are given. Pick ore concentrations from the bracket. (Magnetic Separation, Froth Floatation, Levigation, Leaching): Ore is magnetic. But impurities are non-magnetic.

Nature of some ores are given. Pick ore concentrations from the bracket. (Magnetic Separation, Froth Floatation, Levigation, Leaching): Ores are lighter and impurities are heavier.

Explain the term gangue,flux and slag.

An ore after levigation is found to have acidic impurities. Which of the following can be used as' flux during smelting operation.

Aluminium is prepared industrially by Hall- Heroult process. Various steps in the concentration of ore are given below. Write them in the correct order. i)The precipitate formed is separated, washed and strongly heated to get alumina. ii) Crushed bauxite is leached with hot sodium hydroxide solution. iii) Impurities are removed from the sodium aluminate solution by filtration. iv) Solution is diluted after adding a little aluminium hydroxide, to precipitate aluminium hydroxide .

Nature of some ores are given. Pick out the method of concentration from the bracket (Magnetic separation, Froth floatation, Levigation, Leaching). i) Ores are lighter and impurities are heavier. ii) Ore is magnetic. But impurities are non-magnetic iii) Uses a solution which dissolves the ore iv) Ore is heavier and impurities are lighter.

The impurities associated with the ore after mining are collectively called

Which of the following statements are true? i) Elements which are least reactive occur in free state or native state ii) Earthly or undesired materials present along with ore are called gangue iii) Among metals, aluminium is the most abundant in the earth crust iv) All ores are minerals but all minerals are not ores v) Gemstone "Ruby" is the impure form of Al_2O_3 containing impurity : Co vi) The set of d-block elements Cu, Ag, Au mostly occur as sulphide ore

V PUBLICATION-PRODUCTION OF METALS-QUESTION BANK
  1. Some metals exist in free state because of its..........

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  2. Write one example for an ore separated by leaching.

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  3. Non-removable impurities during ore concentration is called......... ...

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  4. Which reducing agent is used in Blast fumace?

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  5. Gangue + Flux gives .......

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  6. Aluminium is used for making utensils due to its.......

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  7. Write the difference between calcination and roasting .

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  8. Analyse the flow chart given below and answer the following questions....

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  9. Write down the anode, cathode, and electrolyte used in electrolytic ce...

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  10. Clay, cryolite and Bauxite are the minerals of Aluminium. a) Which ...

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  11. Find the relation and fill up suitably. a) Zinc sulphide Roasting: C...

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  12. Analyse the given table and answer the following questions. a) Write...

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  13. Bauxite (AL2 O3, 2H2 O) and clay (Al2 O3 2SiO2 2H2 O) are two natural...

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  14. Electricity and carbon monoxide (CO) and reducing agents used to extra...

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  15. Froth flotation process, hydraulic washing, magnetic separation, leach...

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  16. Complete the table. b) Why different methods are used for purifying t...

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  17. a) Name the ore of Iron? b) Which reduces lon from iron oxide in the...

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  18. a) Write the equation of the chemical reaction taking place at anode a...

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  19. Which of the properties of metals is utilized in the following Instanc...

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  20. a) Which is the main ore of iron? b) Which compound acts as the redu...

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