JEE Main & Advanced Chemistry Metallurgy / धातुकर्म Question Bank

done Concentration Total Questions - 22

• question_answer1)
  Sulphide ores are generally concentrated by [CPMT 1980, 82; EAMCET 1980; MNR 1981; DPMT 1982; KCET 1993]
  A)
  Froth floatation process done clear
  B)
  Magnetic separation done clear
  C)
  Gravity separation done clear
  D)
  By hand picking done clear
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• question_answer2)
   Froth floatation process is used for the concentration of [NCERT 1984; CPMT 1982, 87; MP PMT 1989; BHU 1997; EAMCET 1983; AMU 1984; DPMT 1989; AFMC 2000; MNR 1981; KCET 2000; MP PET 2001; Pb. PMT 2002]
  A)
  Oxide ores done clear
  B)
  Sulphide ores done clear
  C)
  Chloride ores done clear
  D)
  Amalgams done clear
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• question_answer3)
  A process used for the concentration of ore is [MP PMT 1990; MP PET 2003]
  A)
  Froth floatation done clear
  B)
  Roasting done clear
  C)
  Electrolysis done clear
  D)
  Bessemerization done clear
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• question_answer4)
  Magnetic separation is used for increasing concentration of the following [MP PET 1990]
  A)
  Horn silver done clear
  B)
  Calcite done clear
  C)
  Haematite done clear
  D)
  Magnesite done clear
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• question_answer5)
  The substance added in water in the froth floatation process is [EAMCET 1980]
  A)
  Soap powder done clear
  B)
  Pine oil done clear
  C)
  Coconut oil done clear
  D)
  None of the above done clear
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• question_answer6)
  For which ore of the metal, froth floatation method is used for concentration [MP PMT 2001]
  A)
  Horn silver done clear
  B)
  Bauxite done clear
  C)
  Cinnabar done clear
  D)
  Haematite done clear
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• question_answer7)
  Cyanide process is used in the extraction of [DCE 2002, 03]
  A)
  \[Au\] done clear
  B)
  Ag done clear
  C)
  both a and b done clear
  D)
  Cu done clear
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• question_answer8)
  Cassiterite is concentrated by [EAMCET 1998]
  A)
  Levigation done clear
  B)
  Electromagnetic separation done clear
  C)
  Floatation done clear
  D)
  Liquifaction done clear
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• question_answer9)
  Froth floatation process for the concentration of ores is an illustration of the  practical application of [NCERT 1984]
  A)
  Adsorption done clear
  B)
  Absorption done clear
  C)
  Coagulation done clear
  D)
  Sedimentation done clear
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• question_answer10)
  Iron ore is concentrated by [MP PMT 1991]
  A)
  Froth floatation done clear
  B)
  Electrolysis done clear
  C)
  Roasting done clear
  D)
  Magnetic treatment done clear
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• question_answer11)
  An ore of tin containing \[FeCr{{O}_{4}}\] is concentrated by [SCRA 1991]
  A)
  Magnetic separation done clear
  B)
  Froth floatation done clear
  C)
  Electrostatic method done clear
  D)
  Gravity separation done clear
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• question_answer12)
  One of the following metals forms a volatile compound and this property is taken advantage for its extraction. This metal is [NCERT 1984]
  A)
  Iron done clear
  B)
  Nickel done clear
  C)
  Cobalt done clear
  D)
  Tungsten done clear
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• question_answer13)
  Bauxite ore is concentrated by [MP PET 1994; KCET 1999; UPSEAT 2001]
  A)
  Froth flotation done clear
  B)
  Electromagnetic separation done clear
  C)
  Chemical separation done clear
  D)
  Hydraulic separation done clear
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• question_answer14)
  In extraction of copper, we use [CPMT 1980; MP PMT 1986]
  A)
  \[C{{u}_{2}}S\] done clear
  B)
  Pyrites done clear
  C)
  Silver argent cyanide done clear
  D)
  \[CuFe{{S}_{2}}\] done clear
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• question_answer15)
  Which metal is most difficult to be extracted from its oxide
  A)
  \[Cs\] done clear
  B)
  \[Ag\] done clear
  C)
  \[Zn\] done clear
  D)
  \[Mg\] done clear
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• question_answer16)
  Copper pyrites are concentrated by [MNR 1995; UPSEAT 1999; AMU 1999; MP PMT 2003]
  A)
  Electromagnetic method done clear
  B)
  Gravity method done clear
  C)
  Froth floatation process done clear
  D)
  All the above methods done clear
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• question_answer17)
  In the metallurgy of zinc, flux is not used because
  A)
  Zinc ore has no impurities done clear
  B)
  Zinc is volatile hence easily separated done clear
  C)
  Zinc reacts with flux done clear
  D)
  Flux is volatile done clear
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• question_answer18)
  Ores like magnetite or tungstates in tin ores are concentrated by
  A)
  Froth floatation done clear
  B)
  Magnetic separation done clear
  C)
  Gravity separation done clear
  D)
  Electrostatic separation done clear
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• question_answer19)
  Froth-floatation method is successful in separating impurities from ores because [Kerala CET 2005]
  A)
  The pure ore is lighter than water containing additives like pine oil, cresylic acid etc. done clear
  B)
  The pure ore is soluble in water containing additives like pine oil, cresylic acid etc. done clear
  C)
  The impurities are soluble in water containing additives like pine oil, cresylic acid etc. done clear
  D)
  The pure ore is not as easily wetted by water as by pine oil, cresylic acid etc done clear
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• question_answer20)
  An ore like zinc blende is concentrated by [MP PMT 1997]
  A)
  Froth floatation done clear
  B)
  Magnetic separation done clear
  C)
  Leaching done clear
  D)
  Washing with water done clear
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• question_answer21)
  The method of concentrating the ore which makes use of the difference in density between ore and impurities is called [Pune CET 1998]
  A)
  Levigation done clear
  B)
  Leaching done clear
  C)
  Magnetic separation done clear
  D)
  Liquifaction done clear
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• question_answer22)
  Which of the following ore is best concentrated by froth-flotation method [AIEEE 2004]
  A)
  Galena done clear
  B)
  Cassiterite done clear
  C)
  Magnetite done clear
  D)
  Malachite done clear
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