(a) Classify following oxides as neutral, acidic , basic or amphoteric `CO, B_(2)O_(3), SiO_(2), CO_(2), Al_(2)O_(3), PbO_(2), Tl_(2)O_(3)` (b) Write suitable chemcial equations to show their nature.

(a) Classify following oxides as neutral, acidic , basic or amphoteric

1.	(a) Classify following oxides as neutral, acidic , basic or amphoteric `CO, B_(2)O_(3), SiO_(2), CO_(2), Al_(2)O_(3), PbO_(2), Tl_(2)O_(3)` (b) Write suitable chemcial equations to show their nature.
Answer» (a) Neutral oxides : CO : Acidic oxides : `B_(2)O_(3), SiO_(2), CO_(2)` Amphoteric oxides : `Al_(2)O_(3), PbO_(2)` Basic oxide : `Tl_(2)O_(3)` (b) (i) Being acidic `B_(2)O_(3), SiO_(2)` and `CO_(2)` react with alkalis to form salts. `underset("anhydride")underset("Boric")(B_(2)O_(3)) + 2NaOH rarr underset("Sod. metaborate")(2NaBO_(2) + H_(2)O) , underset("Silica")(SiO_(2))+2NaOH overset(Delta)rarrunderset(" Sod. silicates ")(Na_(2)SiO_(3))+H_(2)O` `underset(" Carbon dioxide ")(CO_(2)) + 2NaOH rarr underset(" Sod. carbonate ")(Na_(2)CO) + H_(2)O` (ii) Being amphoteric, `Al_(2)O_(3)` and `PbO_(2)` react with both acids and bases. `underset("Alumina")(Al_(2)O_(3)) + 2NaOH overset("Fuse")rarr underset(" Sod. meta-aluminate ")(NaAlO_(2)) + H_(2)O , Al_(2)O_(3) + 3H_(2)SO_(4) rarr Al_(2)(SO_(4))_(3) + 3H_(2)O` `underset(" Lead dioxide ")(PbO_(2)) + 2NaOH rarr underset(" Sod. plumbate ")(Na_(2)PbO_(3)) + H_(2)O , 2PbO_(2) + 2H_(2)SO_(4) rarr 2PbSO_(4) +2H_(2)O + O_(2)` (iii) Being basic, `Tl_(2)O_(3)` dissolves in acids. `Tl_(2)O_(3) + 6 HCl rarr 2TlCl_(3) + 3H_(2)O`.

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(a) Classify following oxides as neutral, acidic , basic or amphoteric `CO, B_(2)O_(3), SiO_(2), CO_(2), Al_(2)O_(3), PbO_(2), Tl_(2)O_(3)` (b) Write suitable chemcial equations to show their nature.

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