JEE Main & Advanced Chemistry Metallurgy / धातुकर्म Question Bank

done Critical Thinking Question Total Questions - 10

• question_answer1)
  Black Jack is an ore of [PCET 2004]
  A)
  Cr done clear
  B)
  Sn done clear
  C)
  Zn done clear
  D)
  Ni done clear
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• question_answer2)
  Froth floatation process is used for concentration of [MNR 1987; IIT 1989; UPSEAT 2000, 02]
  A)
  Chalcopyrite done clear
  B)
  Bauxite done clear
  C)
  Haematite done clear
  D)
  Calamine done clear
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• question_answer3)
  The process of ore dressing is carried out to [MP PMT 1994]
  A)
  Remove the siliceous materials done clear
  B)
  Add flux to the mineral done clear
  C)
  Convert the ore to oxide done clear
  D)
  Remove the poisonous impurities done clear
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• question_answer4)
  Wolframite ore is separated from tinstone ore by the process of [BHU 2004]
  A)
  Roasting done clear
  B)
  Electromagnetic done clear
  C)
  Smelting done clear
  D)
  Calcination done clear
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• question_answer5)
  Which process of reduction of mineral to the metal is suited for the extraction of copper from its ores with low copper content
  A)
  Metal displacement done clear
  B)
  Auto reduction done clear
  C)
  Chemical reduction done clear
  D)
  Electrolytic reduction done clear
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• question_answer6)
  Pb and Sn are extracted from their chief ore by [IIT-JEE Screening 2004]
  A)
  Carbon reduction and self-reduction. done clear
  B)
  Self reduction and carbon reduction. done clear
  C)
  Electrolysis and self-reduction. done clear
  D)
  Self-reduction and electrolysis. done clear
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• question_answer7)
  Zone refining is a technique used primarily for which one of the following process
  A)
  Alloying done clear
  B)
  Tempering done clear
  C)
  Sintering done clear
  D)
  Purification done clear
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• question_answer8)
  Method used for obtaining highly pure silicon used as a semiconductor material is [CBSE PMT 1994]
  A)
  Oxidation done clear
  B)
  Electrochemical done clear
  C)
  Crystallization done clear
  D)
  Zone refining done clear
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• question_answer9)
  Which is correct [MADT Bihar 1995]
  A)
  Galena : \[M{{g}_{2}}C{{O}_{3}}\] done clear
  B)
  Cassiterite : \[CaC{{O}_{3}}\,MgC{{O}_{3}}\] done clear
  C)
  Dolomite : \[Sn{{O}_{2}}\] done clear
  D)
  Magnesite : \[MgC{{O}_{3}}\] done clear
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• question_answer10)
  'Lapis-Lazuli' is a blue coloured precious  stone. It is mineral of the class [NCERT 1980; AIIMS 1980; BHU 1978, 80]
  A)
  Sodium-alumino silicate done clear
  B)
  Zinc cobaltate done clear
  C)
  Basic copper carbonate done clear
  D)
  Prussian blue done clear
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