NCERT Class XI Chemistry The p-Block Elements Solutions
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Question : 26
Total: 38
(a) Classify following oxides as neutral, acidic, basic or amphoteric:
CO,B 2 O 3 , S i O 2 , C O 2 A l 2 O 3 , P b O 2 , T l 2 O 3
(b) Write suitable chemical equations to show their nature.
CO,
(b) Write suitable chemical equations to show their nature.
Solution:
(a) Neutral oxides : CO
Acidic oxides :B 2 O 3 , S i O 2 , C O 2
Basic oxides :T l 2 O 3
Amphoteric oxides :A l 2 O 3 , P b O 2
(b) (i) CO Neutral to litmus [Neutral]
(ii)B 2 O 3
B 2 O 3 + C u O C u ( B O 2 ) 2
(iii)S i O 2 + 2 N a O H N a 2 S i O 3 + H 2 O
(iv)C O 2 + 2 N a O H N a 2 C O 3 + H 2 O
(v)T l 2 O 3 + 3 H 2 S O 4 T l 2 ( S O 4 ) 3 + 3 H 2 O
(vi)A l 2 O 3 + 6 H C l 2 A l C l 3 + 3 H 2 O
A l 2 O 3 + 2 N a O H N a 2 A l O 2 + H 2 O
(vii)P b O 2 + 2 N a O H N a 2 P b O 3 + H 2 O
P b O 2 + 4 H C l P b C l 2 + C l 2 + 2 H 2 O
Acidic oxides :
Basic oxides :
Amphoteric oxides :
(b) (i) CO Neutral to litmus [Neutral]
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
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