A) Froth floatation process done clear
B) Magnetic separation done clear
C) Gravity separation done clear
D) By hand picking done clear
View Solution play_arrowA) Oxide ores done clear
B) Sulphide ores done clear
C) Chloride ores done clear
D) Amalgams done clear
View Solution play_arrowquestion_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
View Solution play_arrowA) Horn silver done clear
B) Calcite done clear
C) Haematite done clear
D) Magnesite done clear
View Solution play_arrowquestion_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
View Solution play_arrowA) Horn silver done clear
B) Bauxite done clear
C) Cinnabar done clear
D) Haematite done clear
View Solution play_arrowquestion_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
View Solution play_arrowquestion_answer8) Cassiterite is concentrated by [EAMCET 1998]
A) Levigation done clear
B) Electromagnetic separation done clear
C) Floatation done clear
D) Liquifaction done clear
View Solution play_arrowA) Adsorption done clear
B) Absorption done clear
C) Coagulation done clear
D) Sedimentation done clear
View Solution play_arrowquestion_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
View Solution play_arrowquestion_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
View Solution play_arrowA) Iron done clear
B) Nickel done clear
C) Cobalt done clear
D) Tungsten done clear
View Solution play_arrowquestion_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
View Solution play_arrowquestion_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
View Solution play_arrowquestion_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
View Solution play_arrowquestion_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
View Solution play_arrowquestion_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
View Solution play_arrowquestion_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
View Solution play_arrowA) 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
View Solution play_arrowquestion_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
View Solution play_arrowA) Levigation done clear
B) Leaching done clear
C) Magnetic separation done clear
D) Liquifaction done clear
View Solution play_arrowA) Galena done clear
B) Cassiterite done clear
C) Magnetite done clear
D) Malachite done clear
View Solution play_arrow
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