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What is the role of collectors in froth ...

What is the role of collectors in froth floatation process ?

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Collectors such as xanthates, fatty acids, pine oil, etc. enhance the non-wettability of the ore particles thereby indirectly favouring froth formation.
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(a) Write the principle of vapour phase refining. (b) Write the role of dilute NaCN in the extraction of silver. (c) What is the role of collectors in the froth floatation process? Give an example of a collector.

(a) Write the principle involved in the vapour phase refining of metals. (b) Write the name of the metal refined by each of the following processes : (i) Mond process (ii) van Arkel method (c ) What is the role of depresent in froth floatation process ?

What is the role of adsorption in froth floatation process used especially for concentration of sulphide ores?

(i) Name the method of refining to obtain silicon of high purity. (ii) What is the role of SiO_2 in the extraction of copper? (iii) What is the role of depressants in froth floatation process ?

Metal sulphides occur mainly in rocks and metal halides occur in lakes and seas. Give reason. (b) Pine oil is used in froth flatation process. Why ? ( c) What is a depresent ? Give an example. (d) What is the role of stabiliser in froth flotation process ? ( e) What is gangue ?

What is the role of depressant in froth floatation process?

What are the collectors used in froth floatation process? Name a substance that can be used as such.

State the role of depressant in froth floatation process.

(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?

Which of the following is used as collector in froth floatation process ?

ICSE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (VERY SHORT ANSWER QUESTIONS)
  1. How is galena (PbS) present as impurity removed from the ore of zinc b...

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  2. Write a balanced equation for the reaction of argentite with KCN and n...

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  3. In moist air, copper corrodes to produce a green layer on the surface....

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  4. In which of the following cases flux is required? (i) In the smelti...

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  5. What is anode mud" in connection with the metallurgy of copper? What i...

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  6. What is the percentage of silver in German silver'?

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  7. Arrange in descending order of carbon content: Stainless steel, mild s...

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  8. Name a metal which may be extracted from the respective ore by both el...

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  9. What is the composition of Copper matte.

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  10. What is meant by self-reduction process?

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  11. An ore sample of galena (PbS) is contaminated with zinc blende (ZnS). ...

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  12. The extraction of Au by leaching with NaCN involves both oxidation and...

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  13. Why is the froth flotation method selected for the concentration of su...

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  14. What is meant by the term pyrometallurgy?

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  15. At a site, low grade copper ores are available and zinc and iron scrap...

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  16. Why is electrolytic reduction preferred over chemical reduction for th...

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  17. Copper matte is charged into a silica lined converter in extraction of...

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  18. What is the role of collectors in froth floatation process ?

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  19. On what principle is chromatography based ?

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  20. What is the role of cryolite in the extraction of pure aluminium from ...

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