s-Block ElementsHard

Question

At higher temperature sodium metal reacts with alumina to give a sodium compound ′X′. ′X′ is dissolved in water and then carbon dioxide gas is passed through it, a compound ′Y′ is formed. The compound ′X′ and ′Y′ are respectively :

Options

A.Na2O2 and Na2CO3
B.Na2O and Na2CO3
C.Na2O2 and NaAlO2
D.NaAlO2 and Na2CO3.

Solution

Al2O3 + 6 Na → 3 Na2O (X) + 2 Al ; Na2O + H2O →  2 NaOH
NaOH + CO2 → Na2CO3 + H2O
Note :    Na2O2 is formed in presence of air.

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