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In the electrolysis of alumina using cry...

In the electrolysis of alumina using cryolite, the reaction that takes place at cathode is 

A

`12F^(-)rarr6F_(2)+12e^(-)`

B

`4H_(2)O+4e^(-)rarr2H_(2)+4OH^(-)`

C

`6F_(2)+2AlO_(3)rarr4AlF_(3)+3O_(2)`

D

`4Al^(3+)+12e^(-)rarr4Al`

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-ELEMENTS OF BORON FAMILY-OBJECTIVE EXERCISE - 2
  1. The product formed in the reaction BCl(3)+H(2)Orarr

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  2. The correct increasing order of the stability of Al, Ga^(+), In^(+), T...

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  3. In the electrolysis of alumina using cryolite, the reaction that takes...

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  4. Hydrogen gas is liberated when aluminium is treated with A) Air B)...

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  5. Which of the following is weakest Lewis acid ?

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  6. Aluminium reacts with concentrated H(2)SO(4) to liberate SO(2) gas. In...

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  7. In the reaction between boron and sodium hydroxide to liberate hydroge...

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  8. Strongest oxidant among the following is

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  9. Electronegativity of aluminium is 1.5. Electro negativity of thallium ...

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  10. The products formed when boron trichloride is reduced with lithium alu...

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  11. Borax is chemically

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  12. NA(2)B(4)O(7).10H(2)O can also be represented as

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  13. Which of the following is a correct match?

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  14. BCI(3) does not exist as dimer but BH, exist as dimer because

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  15. What is Z in the following reactions? BCl(3)+H(2)underset(450^(@)C)o...

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  16. Observe the following statements : 1) H(3)BO is used as antiseptic ...

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  17. Which of the following statements are correct? i) Boron reacts with ...

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  18. Diborane reacts with HCl in the present of AlCl(3) and liberates

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  19. Which of the following statements is correct?

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  20. Slippery nature of orthoboric acid is due to

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