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    This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct

    Q.

    Flux is often added to remove impurities from an iron ore in a blast furnace. In the reaction slag and flux are

    CaO + SiO2 →CaSiO3  

    The slag and the flux are

  • Question 2
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    Froth flotation process is based on

  • Question 3
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    Which one of the following ores is concentrated by chemical leaching method?

  • Question 4
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    Which of the ore dressing process requires finest size of ore?

  • Question 5
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    Wolframite(FeWO4 ) impurities present in cassiterite (SnO2 ) can be separated by the process of

  • Question 6
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    In the metallurgical process, the flux used for  removing acidic impurities is

  • Question 7
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    Gravity method of ore concentration depends on

  • Question 8
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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 9
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    The slag formed in the extraction of iron from  haematite in the blast furnace is:

  • Question 10
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    In the froth floatation process for benefaction of the ores, the ore particles float because

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