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General Principles and Processes of Isolation of Elements Test - 61

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General Principles and Processes of Isolation of Elements Test - 61
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  • Question 1
    1 / -0
    According to Ellingham diagram, the oxidation reaction of carbon to carbon monoxide may be used to reduce which of the following oxides at the lower temperature?
    Solution

  • Question 2
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    Which of the following Ellingham diagram ensures that at temperature T3{T_3}, AA can reduce COCO ,BB can reduce AOAO ,and BB can reduces COCO but A'A' cannot reduce BOBO? (where AA, BB and CC are three unknown element ).
  • Question 3
    1 / -0
    The correct statement regarding the given Ellingham diagram is :

    Solution

  • Question 4
    1 / -0
    In which of the following chemical leaching is used either in the extraction of metal or in the concentration of ore?
    Solution

  • Question 5
    1 / -0
    A process of heating ore of a metal in excess of air below its melting point is called:
  • Question 6
    1 / -0
    With respect to an ore, Ellingham diagram helps to predict the feasibility if its:
    Solution
    Solution:- (D) Thermal reduction
    Ellingham diagram helps in predicting the feasibility of thermal reduction of ores.
  • Question 7
    1 / -0
    Chief ore of Iron is
  • Question 8
    1 / -0
    The sulphide ore for which the froth floatation process is not used commercially is:
  • Question 9
    1 / -0
    The idea of froth floatation method came from a person X and this method is related to the process Y of ores. X and Y, respectively, are: 
    Solution
    The idea of froth floatation method came from washerwomen and this process is related to concentration of sulphide ores.
  • Question 10
    1 / -0
    Ellingham diagram is used for:
    Solution
    With the help of Ellingham diagram we can select proper reducing agent (C(s)(C_{(s)} or COCO or Al)Al) for metal compound 
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