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The complex formed when Al(2)O(3) is lea...

The complex formed when `Al_(2)O_(3)` is leached from bauxite using concentrated NaOH is :

A

`Na[Al(OH)_4]`

B

`NaAl_2O_4`

C

`Na_2[Al(OH)_3]`

D

`Na_2AlO_2`

Text Solution

Verified by Experts

The correct Answer is:
A
`Al_(2)O_(3) + 2NaOH + 3H_(2)O rarr underset("metaaluminate")("Sodium")(2Na[Al(OH)_4]`.
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Assertion: AIF_(3) , is more readily formed than Al_(2)O_(3) Reason: As the charge on F is less than that in O, it can be formed easily.