Extractive Metallurgy MCQ

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• What are the uses of Aluminium
  ক

  Use in deoxidizer

  খ

  Use as a good conductor

  গ

  Electrical application

  ঘ

  All are correct
• Which of the following statements regarding Kroll's process is not correct?
  ক

  Pure metal chloride serves as main raw material

  খ

  Reduction is done only by sodium

  গ

  Reduction chamber should be free of oxygen

  ঘ

  It is used for extraction oftitanium and zirconium
• Match the metals listed in Group 1 with the most. appropriate extraction routes listed in Group 2.<br>
  ক

  <table class="table-style-1"> <tr> <td><strong>Group 1</strong></td> <td><strong>Group 2</strong></td> </tr> <tr> <td>P. Al</td> <td>1. Blast Furnace</td> </tr> <tr> <td>Q. Ti</td> <td>2. Matte Srrielting</td> </tr> <tr> <td>R. Cu</td> <td>3. Electrolysis of Fused Salts</td> </tr> <tr> <td>S. Fe</td> <td>4. Halide Metallurgy</td> </tr></table> P-3, Q-2, R-4, S-1

  খ

  P-3, Q-4, R-2, S-1

  গ

  P-2, Q-4, R-3, S-1

  ঘ

  P-4, Q-1, R-3, S-2
• Match the following ores with their chemical formula.<br>
  ক

  <table class="table-style-1"> <tr> <td><strong>Group 1</strong></td> <td><strong>Group 2</strong></td> </tr> <tr> <td>P. Sphalerite</td> <td>1. Cu₂S</td> </tr> <tr> <td>Q. Covellite</td> <td>2. CuS</td> </tr> <tr> <td>R. Anglesite</td> <td>3. PbSO₄</td> </tr> <tr> <td>S. Chalcocite</td> <td>4. ZnS</td> </tr></table> P-4, Q-2, R-3, S-1

  খ

  P-4, Q-3, R-2, S-1

  গ

  P-4, Q-2, R-1, S-3

  ঘ

  P-3, Q-2, R-1, S-4
• Characteristics of Aluminium metal
  ক

  Atomic number: 13, Atomic weight: 27

  খ

  Density: 2.702 gm/cm³

  গ

  Melting point: 660°C, Boiling point: 24677°C

  ঘ

  All are correct
• Match the following metals with their extraction processes.<br>
  ক

  <table class="table-style-1"> <tr> <td><strong>Group 1</strong></td> <td><strong>Group 2</strong></td> </tr> <tr> <td>P. Gold</td> <td>1. Pidgeon process</td> </tr> <tr> <td>Q. Titanium</td> <td>2. Cyanidation</td> </tr> <tr> <td>R. Magnesium</td> <td>3. Mond process</td> </tr> <tr> <td>S. Nickel</td> <td>4. Kroll's process</td> </tr></table> P-2, Q-3, R-1, S-4

  খ

  P-2, Q-3, R-4, S-1

  গ

  P-4, Q-3, R- 2, S-1

  ঘ

  P-1, Q-2, R-3, S-4
• Zone refinning is a process in which
  ক

  a metalrod is dipped in a molten pool of liquid to dissolve slowly and the liquid is refined continuously

  খ

  liquid metal is refined in the zone of electric arc in the DC arc furnace

  গ

  a metal in the form of long rod is melted over a short length and molten region is made to traverse along the length of the rod

  ঘ

  a long metal rod is cut into small parts and each part is melted and refined separately
• Match the metal in Group 1 with its corresponding ore in Group 2.
  ক

  <table class="table-style-1"> <tr> <td><strong>Group 1</strong></td> <td><strong>Group 2</strong></td> </tr> <tr> <td>P. Ni</td> <td>1. Monazite</td> </tr> <tr> <td>Q. Th</td> <td>2. Cassiterite</td> </tr> <tr> <td>R. Pb</td> <td>3. Penlandite</td> </tr> <tr> <td>S. Sn</td> <td>4. Galena</td> </tr></table> P-1, Q-3, R-4, S-2

  খ

  P-4, Q-3, R-3, S-1

  গ

  P-3, Q-1, R-4, S-2

  ঘ

  P-2, Q-3, R-1, S-4
• Which one of the following minerals is a source of titanium?
  ক

  Haematite

  খ

  Magnetite

  গ

  Ilmenite

  ঘ

  Pyrolusite
• In the commercial production of which of the following metals, metallothermic reduction is used?
  ক

  Copper

  খ

  Zinc

  গ

  Zirconium

  ঘ

  Nickel
• What are the disadvantages of Newer Process
  ক

  A thick mushy layer form in between matte and slag which interfering into the separation

  খ

  A wide variation in temperature as 200°C at top to 1200°C

  গ

  Both A and B

  ঘ

  None of these
• In the Gadeu Process, the purity in % and density of Aluminium
  ক

  2.29 &amp; 99.99

  খ

  3.29 &amp; 99.99

  গ

  4.29 &amp; 99.99

  ঘ

  None of these
• Match the extraction methods in Group 1 with the metals in Group 2.<br>
  ক

  <table class="table-style-1"> <tr> <td><strong>Group 1</strong></td> <td><strong>Group 2</strong></td> </tr> <tr> <td>P. Roasting followed by carbothermic reduction</td> <td>1. Ti</td> </tr> <tr> <td>Q. Electrolysis of fused salt</td> <td>2. Pb</td> </tr> <tr> <td>R. Roasting followed by controlled oxidation</td> <td>3. Al</td> </tr> <tr> <td>S. Halide process</td> <td>4. Cu</td> </tr> <tr> <td></td> <td>5. Au</td> </tr></table> P-2, Q-3, R-4, S-1

  খ

  P-5, Q-4, R-3, S-1

  গ

  P-2, Q-5, R-1, S-4

  ঘ

  P-3, Q-2, R-5, S-1
• What are the uses of Manganese
  ক

  Manganese (IV) oxide is used as a catalyst

  খ

  As an oxidizing agent

  গ

  used to make fertilisers and ceramics

  ঘ

  All are correct
• In a roasting process, the set of conditions that favour sulphate formation from metal sulphide concentrates are.<br>P. high temperature<br>Q. high partial pressure of oxygen<br>R. use of excess air<br>S. high partial pressure of SO₃
  ক

  P, R and S

  খ

  P, Q and R

  গ

  Q and S

  ঘ

  R and S
• Process of extraction of Zn is
  ক

  Electrolytic

  খ

  Imperial smelting

  গ

  Both A and B

  ঘ

  None of these
• If supposed speed of rotation of ball mill is too much high, then what force generally take place inside the container.
  ক

  Centrifuging

  খ

  Cataracting

  গ

  Cascading

  ঘ

  None of these
• Mattee smelting is used in the extraction of
  ক

  lead

  খ

  zinc

  গ

  aluminium

  ঘ

  copper
• Which metal is extracted by leaching?
  ক

  Iron

  খ

  Aluminium

  গ

  Lead

  ঘ

  Gold
• Percentage of nickel present in concentrated Ni ore is
  ক

  0.5 - 2%

  খ

  1.20%

  গ

  10%

  ঘ

  None of these
• Hydrometallurgy is a process of extraction in which extraction of metal is done
  ক

  High grade copper ore

  খ

  Lean oxide and mixed copper ore

  গ

  The place, where electricity is cheap

  ঘ

  None of these
• The Al₂O₃ content of cryolite in Hall-Heroult's cell is maintained between
  ক

  2 - 5%

  খ

  18 - 20%

  গ

  12 - 15%

  ঘ

  6 - 12%
• Monazite deposits constitute an important source forthe following metal
  ক

  Thorium

  খ

  Titanium

  গ

  Molybdenum

  ঘ

  None of the above
• Which types of process generally take place by friction moments along wet vibrating solid surface
  ক

  Jigging

  খ

  Tabling

  গ

  Floatation

  ঘ

  None of the these
• Identify the correct statement with reference to the extractive metallurgy of aluminium.
  ক

  The electrolyte consists of molten Na₃AlF₆ with approximately 1 to 8% Al₂O₃

  খ

  Approximately 80% of the aluminium deposited on the cathode comes from cryolite

  গ

  Sodium is deposited along with aluminium, but is immediately vapourised

  ঘ

  Anode effect sets in when the cryolite concentration goes below 40%
• Match the process in group 1 to its description in group 2.<br>
  ক

  <table class="table-style-1"> <tr> <td><strong>Group 1</strong></td> <td><strong>Group 2</strong></td> </tr> <tr> <td>P. COREX process</td> <td>1. Decarburisation of liquid steel</td> </tr> <tr> <td>Q. OBM process</td> <td>2. Steel making using oxygen</td> </tr> <tr> <td>R. Carbonyl process</td> <td>3. Nickel refmning</td> </tr> <tr> <td>S. AOD process</td> <td>4. Alternative route of liquid iron production</td> </tr></table> P-4, Q-2, R-3, S-1

  খ

  P-3, Q-1, R-2, S-4

  গ

  P-1, Q-4, R-3, S-1

  ঘ

  P-2, Q-1, R-3, S-4
• Match the metals in Group 1 with the processes in Group 2.<br>
  ক

  <table class="table-style-1"> <tr> <td><strong>Group 1</strong></td> <td><strong>Group 2</strong></td> </tr> <tr> <td>P. Aluminium</td> <td>1. Poling</td> </tr> <tr> <td>Q. Copper</td> <td>2. Fused salt electrolysis</td> </tr> <tr> <td>R. Zinc</td> <td>3. Rotary kiln process</td> </tr> <tr> <td>S. Iron sponge</td> <td>4. Distillation</td> </tr></table> P-1, Q-2, R-3, S-4

  খ

  P-2, Q-1, R-4, S-3

  গ

  P-1, Q-2, R-4, S-3

  ঘ

  P-3, Q-4, R-2, S-1
• Debismuthizing of lead extraction
  ক

  The base bullion consists high Bi% which get separated

  খ

  addition of Ca and Mg to forms an insoluble intermetallic compound of Bi

  গ

  Both A and B

  ঘ

  None of these
• Which types process involve for Mg Extraction
  ক

  Pidgeon process

  খ

  WORCA process

  গ

  Both A and B

  ঘ

  None of the these
• Ores of Titanium are
  ক

  Rutile: TiO₂

  খ

  Ilmenite: FeO.TiO₂

  গ

  Both A and B

  ঘ

  None of these