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How the impurities of ore are removed by...

How the impurities of ore are removed by chemical method?

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Fluoride can not be removed by ion-exchange method. Why?

The impurities are oxidised in this method.

Knowledge Check

  • In Contact process impurities of arsenic are removed by:

    A
    `Al(OH)_(3)`
    B
    `Fe(OH)_(3)`
    C
    `Cr(OH)_(3)`
    D
    `Fe_(2)O_(3)`

  • In contact process impurities of arsenic are removed by:

    A
    `Al(OH)_(3)`
    B
    `Fe(OH)_(3)`
    C
    `Cr(OH)_(3)`
    D
    `Fe_(2)O_(3)`

  • (A) Levigation is used for the separation of oxide ores from impurities (R) Ore particles are removed by washing in a current of water.

    A
    Both (A) and (R) are true and (R) is the correct explanation of (A)
    B
    Both (A) and (R) are true and (R) is not the correct explanation of (A)
    C
    (A) is true but (R) is false
    D
    Both (A) and (R) are false

    • Similar Questions

    Explore conceptually related problems

    Which of the following is a chemical method ?

    How do the impurities change during smelting ?

    (A): Levigation is used for the separation of oxide ores from impurities (R) : Ore particles are removed by washing in a current of water.

    (A): Levigation is used for the separation of oxide ores from impurities (R) : Ore particles are removed by washing in a current of water.

    Lead impurity is removed from silver by

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