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Bauxite ore is made up of Al(2)O3 + SiO...

Bauxite ore is made up of `Al_(2)O_3` + `SiO_2` + `TiO_2` + `Fe_(2)O_3` . This ore is treated with conc. NaOH solution at 500 K and 35 bar pressure for a few hours and filtered hot. In the filtrate the species present are :

A

` NaAl(OH) _4 ` only

B

`Na_2 Ti(OH)_6 ` only

C

` NaAl(OH)_4 ` and ` Na_2SiO_3 ` both

D

` Na_2 SiO_3 ` only

Text Solution

Verified by Experts

The correct Answer is:
C
Both ` Al_2O_ 3 and SiO_ 2 ` dissolve in NaOH as NaAl ` (OH)_4 and Na_ 2 SiO_ 3 ` respectively.
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PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -COMPETITION FOCUS (JEE(Main and Advanced)/MEDICAL ENTRANCE SPECIAL) MULTIPLE CHOICE QUESTIONS (I)
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