S Block Elements Question 63
Question: Sodium is heated n excess of air, free from $ CO_2 $ at $ 350{}^\circ $ C to from X. X. absorbs $ CO_2 $ and forms $ Na_2CO_3 $ and Y. ‘X’ and ‘Y’ are respectively:
Options:
A) $ Na_2{O _{{}}} $ and $ O_2 $
B) $ Na_2O_2 $ and $ O_2 $
C) $ Na $ $ O_2 $ and $ O_2 $
D) $ Na_2O_2 $ and $ O_3 $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ 2Na+O_2(air)\xrightarrow{350{}^\circ C}Na_2O_2(X) $
$ 2CO_2+2Na_2O_2\to 2Na_2CO_3+O_2(Y) $
Note: $ Na_2O_2+O_2\xrightarrow[300atm]{450{}^\circ C}2NaO_2 $ $ Na+O_2 $ (limited amount) $ \xrightarrow{180{}^\circ C}Na_2O $
BETA
