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Extraction of Aluminiunt can be understo...

Extraction of Aluminiunt can be understood by :

Electrolytic reduction of `Al_(2)O_(3) :`
`{:("Electrolyte",:(Al_(2)O_(3)+"Cryolite")),("Cathode",:"Graphite inside the Fe container"),("Anode",:"Graphite rods"):}`
The purpose of adding cryolite is

A

to increase the electrical conductivity of pure aluminium

B

to lower the melting point of `Al_(2)O_(3)`

C

to remove the impurities as slag

D

to increase the Al %in the yield

Text Solution

Verified by Experts

The correct Answer is:
B
By adding Cryolite M.pt of `Al_(2)O_(3)` decreases, conductivity of `Al_(2)O_(3)` increase
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Knowledge Check

  • Carbon cannot be used in the reduction of Al_2 O_3 because

    A
    it is an expensive proposition
    B
    the enthalpy of formation of `CO_2` is more than that of` Al_2 O_3`
    C
    pure carbon is not easily available
    D
    the enthalpy of formation of `Al_2 O_3`

  • Carbon cannot be used in the reduction of Al_2 O_3 because

    A
    it is an expensive proposition
    B
    the enthalpy of formation of `CO_2` is more than that of` Al_2 O_3`
    C
    pure carbon is not easily available
    D
    the enthalpy of formation of `Al_2 O_3`

  • The Nature of Al_2 O_3 is

    A
    Neutral
    B
    Amphoteric
    C
    Basic
    D
    Acidic

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