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question_answer1) In electrolytic refining of metals, electrolysis of an aqueous solution of its complex salt is done with impure metal as anode and an strip of pure metal as cathode. This method cannot be used for the refining of the metal [MP PMT 1989]
question_answer2) Which method of purification is represented by the equation? \[\underset{\text{Impure}}{\mathop{Ti+2{{I}_{2}}}}\,\xrightarrow{500K}Ti{{I}_{4}}\xrightarrow{1675K}\underset{\text{Pure}}{\mathop{Ti+2{{I}_{2}}}}\,\] [AIIMS 1983]
question_answer3) Cupellation process is used in the metallugry of [CPMT 1983; MP PET 1994; MP PMT 2000, 02]
question_answer4) Metals are [MADT Bihar 1983]
question_answer5) The cyanide process is used for obtaining [DPMT 1982; CPMT 1976, 84, 90; MNR 1995; MP PET/PMT 1998; AIEEE 2002]
question_answer6) In electrolytic refining, the impure metal is made is used to make [MP PET 2003]
question_answer7) Of the following, which cannot be obtained by electrolysis of the aqueous solution of their salts [IIT 1990]
question_answer8) Van Arkel method of purification of metals involves converting the metal to a [BHU 1990]
question_answer9) Zone refining is a method to obtain [KCET 1993]
question_answer10) Which one of the following is manufactured by the electrolysis of fused sodium chloride [CPMT 1979, 83, 91]
question_answer11) A metal which is refined by poling is [RPET 2000]
question_answer12) Silver obtained from argentiferrous lead containing lead impurity is purified by [CPMT 1981; MP PMT 1990; EAMCET 1998]
question_answer13) If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal, then the purification of metal may be carried out by [MP PMT 1997]
question_answer14) Electric refining is used for refining of [DPMT 1996]
question_answer15) Zone refining is used for the purification of [Pune CET 1998]
question_answer16) Mond's process is used for preparing [MNR 1983]
question_answer17) Gold is extracted by hydrometallurgical process based on its property [KCET 2005]
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