S Block Elements Question 70
Question: At higher temperature sodium metal reacts with alumina to give a sodium compounds ‘X’, ‘X’ is dissolved in water and then carbon dioxide gas is passed through it, a compound ‘Y’ us formed. The compound ‘X’, ‘Y’ are respectively
Options:
A) $ Na_2O_2 $ and $ Na_2CO_3 $
B) $ Na_2O $ and $ Na_2CO_3 $
C) $ Na_2O_2 $ and $ NaAlO_2 $
D) $ NaAlO_2 $ and $ Na_2CO_3 $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ Al_2O_3+6Na\to 3Na_2O(X)+2Al; $
$ Na_2O+H_2O\to 2NaOH $
$ NaOH+CO_2\to Na_2CO_3+H_2O $
Note: $ Na_2O_2 $ is formed in presence of air.
BETA
