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Extraction of metals: Me..



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Q1. Which of the following is the most suitable ore to undergo electrochemical process?

(a) Kaolinite
(b) Calamine
(c) Bauxite
(d) Cinnabar

Q2. Which of the following is an example of electrochemical principles of metallurgy?

(a) Baeyer?s process
(b) Solvay process
(c) Bergius process
(d) Hall-Heroult process

Q3. Electrochemical processes in metallurgy are spontaneous.

(a) True
(b) False
(c) -
(d) -

Q4. What is the temperature maintained in Hall-Heroult process?

(a) 800?-840? C
(b) 840?-880? C
(c) 900?-940? C
(d) 940?-980? C

Q5. What is the net reaction in Hall-Heroult process?

(a) 2Al2O3 + 3C ? 4Al + 3CO2
(b) 4Al2O3 + 3C ? 4Al + 6CO2
(c) F2 + Al2O3 ? Al + F2O3
(d) Na3AlF6 ? AlF3 + 3NaF

Q6. In the metallurgy of aluminium, purified bauxite is mixed with Na2AlF6.

(a) True
(b) False
(c) -
(d) -

Q7. What is the anode and cathode used in Hall-Heroult process?

(a) Zinc and copper
(b) Iron and copper
(c) Carbon and zinc
(d) Graphite and carbon

Q8. What is the term given to the extraction of aluminium from bauxite by using electrochemical process?

(a) Baeyer?s process
(b) Hall-Heroult process
(c) Mc-Arthur process
(d) Blasts process

Q9. What is the process used to extract sodium from halide ores such as sodium chloride (NaCl)?

(a) Pyro metallurgy
(b) Hydro metallurgy
(c) Electro metallurgy
(d) Magnetic separation

Q10. Which of the following metals are reduced from molten salt solutions by electrolysis?

(a) Aluminium
(b) Silver
(c) Iron
(d) Zinc


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Froth Floatation Process Is Used For Concentration Of

Modified 138 Year Ago

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