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.

Al ( OH ) 3 and Al 2 O 3 ⋅ xH 2 O

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.

Al ( OH ) 3 and Al 2 O 3 ⋅ xH 2 O

Na Al ( OH ) 4 and Al 2 O 3 ⋅ xH 2 O

Na Al ( OH ) 4 and Al 2 CO 3 3 ⋅ xH 2 O

NaAlO 2 and Al 2 CO 3 3 ⋅ xH 2 O

Al ( OH ) 3 and Al 2 O 3 ⋅ xH 2 O

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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.

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$Na [Al (OH)_{4}] and {Al}_{2} O_{3} \cdot {xH}_{2} O$

$Na [Al (OH)_{4}] and {Al}_{2} {({CO}_{3})}_{3} \cdot {xH}_{2} O$

${NaAlO}_{2} and {Al}_{2} {({CO}_{3})}_{3} \cdot {xH}_{2} O$

$Al (OH)_{3} and {Al}_{2} O_{3} \cdot {xH}_{2} O$

answer is D.

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Detailed Solution

$\underset{Alumina}{{Al}_{2} O_{3} (s)} + 2 NaOH (aq) + 3 H_{2} O (l) \to_{35 - 36 bar}^{473 - 523 K} 2 \underset{\underset{(X)}{Sodium aluminate}}{Na [Al (OH)_{4}] (aq)}$
$2 Na [Al (OH)_{4}] (aq) + {CO}_{2} (g) ⟶ \underset{\underset{(Y)}{Hydrated alumina}}{{Al}_{2} O_{3} \cdot {xH}_{2} O (s)} + 2 {NaHCO}_{3} (aq)$

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