NCERT Class XI Chemistry The s-Block Elements Solutions
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Question : 25
Total: 32
What happens when
(i) sodium metal is dropped in water ?
(ii) sodium metal is heated in free supply of air ?
(iii) sodium peroxide dissolves in water ?
(i) sodium metal is dropped in water ?
(ii) sodium metal is heated in free supply of air ?
(iii) sodium peroxide dissolves in water ?
Solution:
(i) H 2
2Na +2 H 2 O 2 N a O H + H 2 ( g )
(ii) Sodium peroxide is formed along with a small amount ofN a 2 O
2 N a ( s ) + O 2 ( g )
N a 2 O ( s ) +
O 2
(iii) It liberates hydrogen peroxide.
N a 2 O 2 + 2 H 2 O 2 N a O H + H 2 O 2
2Na +
(ii) Sodium peroxide is formed along with a small amount of
(iii) It liberates hydrogen peroxide.
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