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Principles & Isolation of Elements Test - 4

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Principles & Isolation of Elements Test - 4
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Weekly Quiz Competition
  • Question 1
    1 / -0.25

    The common impurity present in most of the ores is

    Solution

    Silica is most common impurity present in ores.

  • Question 2
    1 / -0.25

    Which metal is also found in sea beds ?

    Solution

    Manganese is found in sea beds.

  • Question 3
    1 / -0.25

    The sulphide ore of iron is

    Solution

    FeS2  is iron pyrites.

  • Question 4
    1 / -0.25

    Carbonate ore of iron is

    Solution

    FeCO3  is siderite.

  • Question 5
    1 / -0.25

    The process of separating gangue and other impurities from the metals is known as

    Solution

    Process of removal of impurities from ore is known as concentration of ore or benefication of ore.

  • Question 6
    1 / -0.25

    Which technique utilizes the density difference between the ore and the impurity to concentrate the ore is

    Solution

    Levigation is process of grinding an insoluble substance to a fine powder while wet. The material is introduced into mill together with water. It is based on the density difference between ore and impurity.

  • Question 7
    1 / -0.25

    Gravity separation technique is mainly applicable to

    Solution

    Gavity separation is done maily for oxide ores.

  • Question 8
    1 / -0.25

    The diagram shows schematic representation of  

    Solution

    This is hydraulic washing or gravity separation. Here whwn stream of water is passed it takes away all the impurity with it.

  • Question 9
    1 / -0.25

    In extraction of gold and silver, the metals is leached into aqueous solution using

    Solution

    CN-  forms complex with gold or silver.

  • Question 10
    1 / -0.25

    Liquation method is used for the metals which have

    Solution

    Liquification is purification technique used for metals having low melting points.

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