Sodium is heated in air at `300^(0)`C to form X, X absorbs `CO_(2)` and forms `Na_(2)CO_(3)` and Y. Which of the following is Y.

Sodium is heated in air at 300^(@)C to form X.X absorbs CO_(2) and forms Na_(2)CO_(3) and Y. Which of the following is Y ?

Sodium is heated in air at 350^@C to form X. X absorbs C0_2 and forms sodium carbonate and Y. Which of the following is Y ?

Sodium is heated in excess of air, free from CO_(2) at 350^(@)C to form X.X absorbs CO_(2) and forms Na_(2)CO_(3) and Y.'X' and 'Y' are respectively :

Sodium when heated in air at 350^(@)C forms compound X.X obsorbs CO_(2) and liberates Y.Y is

Sodium when heated at 300^@C in air forms X which absorbs CO_2 to form Na_2CO_3 and a compound Y. The compound Y is-