1.

Bauxide 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 areA. `NaAl(OH)_(4)` onlyB. `Na_(2)Ti(OH)_(6)` onlyC. `NaAl(OH)_(4)` and `Na_(2)SiO_(3)` bothD. `Na_(2)SiO_(3)` only

Answer» Correct Answer - C
`Al_(2)O_(3)` and `SiO_(2)` reacts with conc. `NaOH` to give `NaAl(OH)_(4)` and `Na_(2)SiO_(3)` respectively.


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