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question_answer1) Black Jack is an ore of [PCET 2004]
question_answer2) Froth floatation process is used for concentration of [MNR 1987; IIT 1989; UPSEAT 2000, 02]
question_answer3) The process of ore dressing is carried out to [MP PMT 1994]
question_answer4) Wolframite ore is separated from tinstone ore by the process of [BHU 2004]
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
question_answer6) Pb and Sn are extracted from their chief ore by [IIT-JEE Screening 2004]
question_answer7) Zone refining is a technique used primarily for which one of the following process
question_answer8) Method used for obtaining highly pure silicon used as a semiconductor material is [CBSE PMT 1994]
question_answer9) Which is correct [MADT Bihar 1995]
question_answer10) 'Lapis-Lazuli' is a blue coloured precious stone. It is mineral of the class [NCERT 1980; AIIMS 1980; BHU 1978, 80]
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