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Isolation of El...

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  • Question 1
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    Which one of the following is the major impurity in pig iron?

     

  • Question 2
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    In smelting the furnace most suitable is

  • Question 3
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    Silver from argentiferous lead is obtained by

  • Question 4
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    Which of the following has lowest carbon content?

  • Question 5
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    During the process of electrolytic refining of copper, some metals present as impurity settle as anode mud. These are

  • Question 6
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    2CuCO3 . Cu(OH)2 is the formula of

  • Question 7
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    The temperature of the slag zone in the metallurgy of iron using blast furnace is

  • Question 8
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    The Puddler’s candles are produced due to the burning of

  • Question 9
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    In the extraction of copper, the metal formed in the Bessemers convertor is due to the reaction

  • Question 10
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    Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of

  • Question 11
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    Froth flotation process is based on

     

  • Question 12
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    Annealing improves

  • Question 13
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    Which of the ore dressing process requires finest size of ore?

     

  • Question 14
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    Gravity method of ore concentration depends on

     

  • Question 15
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    Sulphide ores of metals are usually concentrated by froth floatation process.Which one of the following sulphide ores offers an exception and  is concentrated by leaching?

     

  • Question 16
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    Comprehension Type

    Direction (Q. Nos. 16-17) This section contains a paragraph, describing theory, experiments, data, etc.
    Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

    Passage

    Steel is the most important commercial variety of iron. The % of carbon in this form of iron is midway between that of cast iron and wrought iron i.e. 0.25 to 2 %.
    There are many varieties of steel depending on the amount of carbon present in it such as mildj^teels, hard steels and special steels. Steel mixed with small amount of Ni, Co, Cr, W, Mo, Mn etc., acquire special properties. Such products are called alloy steels.

    Q. 

    Which of the following is used to make permanent magnets?

  • Question 17
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    Passage

    Steel is the most important commercial variety of iron. The % of carbon in this form of iron is midway between that of cast iron and wrought iron i.e. 0.25 to 2 %.
    There are many varieties of steel depending on the amount of carbon present in it such as mild steels, hard steels and special steels. Steel mixed with small amount of Ni, Co, Cr, W, Mo, Mn etc., acquire special properties. Such products are called alloy steels.

    Q. 

    Steel used in making pendulums, measuring tapes

  • Question 18
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    Matching List Type

    Direction (Q. No. 18 and 19) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

    Q. 

    Match the Column I with Column II and mark the correct option code.

  • Question 19
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    Match the Column I with Column II and mark the correct option code.

  • Question 20
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    Direction (Q. No. 20-24) This section contains 5 questions. When worked out will result is an integer from 0 to 9 (both inclusive).

    Q. 

    The percentage of copper in duralumin is

     

  • Question 21
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    The percentage of silver in German silver is

     

  • Question 22
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    Mohr’s salt is a double salt with the formula FeSO4(NH4)2SO4xH2O. Here, value of x is

     

  • Question 23
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    Number of unpaired electrons in the complex [Ag(CN)2]- are

     

  • Question 24
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    The number of silver containing compounds among Nessler’s reagent, Tollen’s reagent, Baeyer’s reagent, Corrosive sublimate, Horn silver, Ruby silver, Calomel.

     

  • Question 25
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    Statement Type

    This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

    Q. 

    Statement I : Silver is obtained from its cyanide complex during leaching.

    Statement II : Copper can be extracted by poling process when it contain Cu2O as impurities.

     

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