(a) Classify following oxides as neutral, acidic, basic or amphoteric: CO, B2O3, SiO2, CO2, Al2O3, PbO2, Tl2O3 (b) Write suitable chemical equations to show their nature.

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(1) CO = Neutral (2) B2O3 = Acidic Being acidic, it reacts with bases to form salts. It reacts with NaOH to form sodium metaborate. (3) SiO2 = Acidic Being acidic, it reacts with bases to form salts. It reacts with NaOH to form sodium silicate. (4) CO2 = Acidic Being acidic, it reacts with bases to...
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(1) CO = Neutral (2) B2O3 = Acidic Being acidic, it reacts with bases to form salts. It reacts with NaOH to form sodium metaborate. (3) SiO2 = Acidic Being acidic, it reacts with bases to form salts. It reacts with NaOH to form sodium silicate. (4) CO2 = Acidic Being acidic, it reacts with bases to form salts. It reacts with NaOH to form sodium carbonate. (5) Al2O3 = Amphoteric Amphoteric substances react with both acids and bases. Al2O3 reacts with both NaOH and H2SO4. (6) PbO2 = Amphoteric Amphoteric substances react with both acids and bases. PbO2 reacts with both NaOH and H2SO4. (7) Tl2O3 = Basic Being basic, it reacts with acids to form salts. It reacts with HCl to form thallium chloride. read less
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