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Hoop's process of purification of alumin...

Hoop's process of purification of aluminium involves formation of layers during electrolysis. It involves:

A

the three layers have same densities but different materials.

B

the three layers have different densities.

C

the upper layer is of pure aluminium which acts as a cathode.

D

the bottom layer is of impure aluminium which acts as an anode and middle layer consists of cryolite and `BaF_2` .

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The correct Answer is:
B, C, D
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Knowledge Check

  • Hoop's process of purification of aluminium involves formation of layers during electrolysis. This is because [True/False (T = True, F= False)] (i) the three layers have same densities but different materials (ii) the three layers have different densities (iii) the upper layer is of pure aluminium which acts as a cathode (iv) the bottom layer is of impure a aluminium which acts as an anode and middle layer consists of NaF, BaF_(2) and AlF_(3)

    A
    FTTF
    B
    FTTT
    C
    TTFT
    D
    FFTF

  • Back bonding involves the formation of

    A
    `sigma`bond
    B
    Coordinate bond
    C
    `pi` bond
    D
    None of these.

  • sc RNA is involved in formation of

    A
    Polypeptide over ribosome
    B
    Signal recognition ribosome
    C
    tRNA
    D
    Peptide bond formation.
    • MOTION-METALLURGY-EXERCISE 2 (LEVEL - II)
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    3. Calcination and roasting process of reduction of ores to their oxides ...

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    4. In the extraction of copper, the reaction which takes place in Besseme...

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    5. Extraction of silver from argentiferrous lead (Pb + Ag) involves :

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    6. In the manufacture of metallic sodium by the fused salt electrolysis (...

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    7. The metal(s) which does/do not form amalgam is/are:

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    8. Auto reduction process is used in extraction of

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    9. Zone refining is used for purification of :

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    10. Which of the following process(es) are used for purification of Bauxit...

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    11. Metals which can be extracted by smelting process are :

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    12. the common impurities present in bauxite are

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    13. Which of the following reduction reactions are actually employed in co...

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    14. Which of the following cannot be obtained by electrolytic reduction of...

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    15. Which of the following ores are concentarted by froth floatation?

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    16. Which of the following statement(s) is/are common between roasting and...

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    17. Which of the following reaction(s) occurs during calcination?

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    18. Roasting can be performed in:

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    19. Which of the following is(are) sulphide ores?

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    20. Which of the following is(are) regarded as iron ores?

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