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Froth floatation :...

Froth floatation :

A

is a physical method of separating mineral from the gangue

B

is a method to concentrate the ore depending on the difference in wetability of gangue and the ore

C

is used for the sulphide ores

D

is a method in which impurities sink to the bottom

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The correct Answer is:
A, B, C, D
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STATEMENT-1 : CuSO_(4) acts as froth activator in froth floatation process. STATEMENT-2 : Froth floatation method belong with benefecation of metallurgy. STATEMENT-3 : NaCN as depresent to form complex with ZnS out of PbS and ZnS .

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende Write the formula of cryolite.

Match the following: {:("(i) Diazotisation", "(a) Bakelite"),( "(ii) Argentite", "(b) Nernst equation"),( "(iii) Thermosetting plastics" ,"(c) Aniline"),( "(iv) Electrochemical cell", "(d) Ethylenediamine"),( "(v) Bidentate ligand", "(e) Froth floatation process"):}

Match the following processes of metallurgy with their corresponding ore for which they are used : (i) Froth floatation method (a) Germanium (ii) Electrolytic refining of metals (b) ZnS (iii) Zone refining of metals (c) copper

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende Write down the three letters each from the list above, which are relevant to : 1. Zinc 2. Aluminium

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende The ore from which aluminium is extracted must first be treated with ............ so that pure aluminium oxide is obtained.

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende Pure aluminium oxide is dissolved in to make a conducting solution.

A to F below are related to the source and extraction of either Zinc or Aluminium. A. Bauxite B. Coke C. Cryolite D. Froth floatation E. Sodium hydroxide solution F Zinc blende Write down the three letters each from the list above, which are relevant to : Aluminium

(a) Write the principle of electrolytic refining. (b) Why does copper obtained in the extraction from copper pyrites bave a blistered appearance? (c) What is the role of depressants in the froth floatation process?

(a) Write the principle of method used for the refining of germanium (b) Out of PbS and PbCO_(3) (ores of lead), which one is concentrated by froth floatation process preferably ? (c) What is the significance of leaching in the extraction of aluminium ?

VK JAISWAL ENGLISH-METALLURGY-One OR MORE ANSWERS IS/ ARE CORRECT
  1. Roasting is carried out to :

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  2. The chemical treatment of the ore for concentration is done in the cas...

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  3. Froth floatation :

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  4. Which of the following reaction (s) occur during calcination ?

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  5. Amphoteric nature of aluminium is employed in which of the following p...

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  6. Which of the following is true for calcination of metal ore ?

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  7. The difference (s) between roasting and calcination is / are :

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  8. The etraction of metals from oxide ores involves

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  9. Metals which can be extracted by smelting process are :

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  10. Of the following reduction processes, correct processes are :

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  11. In the extraction of aluminium metal, one of the process is summarised...

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  12. During the production of iron and steel.

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  13. The smelting of iron in a blast furnace involves, which of the followi...

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  14. For which of the following metals can be extracted by aluminothermic p...

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  15. For which of the following metal, the carbon reduction cannot be used ...

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  16. The advantage(s) of using carbon to reduce a number of oxides and othe...

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  17. The disadvantage of carbon reduction method are :

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  18. Which of the following metal (s) is /are commercially extracted by sel...

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  19. Which of the following is / are correctly matched ?

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  20. The funciton of adding cryolite in the electrolytic reduction of alumi...

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