devarshi-dt-logo

Question:

In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X'. When CO2 gas is passed through the aqueous solution of 'X', a hydrated compound 'Y' is precipitated. 'X' and 'Y' respectively are:

NaAlO2andAl2(CO3)3·xH2O

Na[Al(OH)4]andAl2O3·xH2O

Na[Al(OH)4]andAl2(CO3)3·xH2O

Al(OH)3andAl2O3·xH2O

Solution:

In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X'. When CO2 gas is passed through the aqueous solution of 'X', a hydrated compound 'Y' is precipitated. 'X' and 'Y' are Na[Al(OH)4] and Al2O3·xH2O respectively. Hence, the correct option is D.