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  • Classify the given oxide as neutral, acidic, basic or amphoteric. Write suitable chemical equations to show their nature. (i) CO

11.26     Classify the given oxide as neutral, acidic, basic, or amphoteric. Write suitable chemical equations to show their nature.

                   CO,B_{2}O_{3},SiO_{2},CO_{2},Al_{2}O_{3},PbO_{2},Tl_2O_{3}

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CO is a neutral

Acidic oxides-
Being acidic, the oxides react with bases to form a salt. So take base = sodium hydroxide (NaOH) 

B_{2}O_{3},\ SiO_{2},\ CO_{2}
These compounds react with a base to form salts, e.g., sodium metaborate, sodium silicate, and sodium carbonate, respectively.
\\B_{2}O_{3}+2NaOH\rightarrow 2NaBO_{2}+H_{2}O\\ SiO_{2}+2NaOH\rightarrow 2Na_{2}SiO_{3}+H_{2}O\\ CO_{2}+2NaOH\rightarrow 2Na_{2}CO_{3}+H_{2}O

Basic Oxides- 
It reacts with an acid to form salts. let acid = hydrochloric acid (HCl). For example, thallium chloride.

Tl_{2}O_{3}+6HCl\rightarrow 2TlCl_{3}+3H_{2}O

Amphoteric Oxides-
These oxides have a tendency to react with acid as well as with the base.

PbO_{2},\ Al_2O_{3}
The reaction of lead oxide with acid and base

\\PbO_{2}+2NaOH\rightarrow Na_{2}PbO_{3}+H_{2}O\\ PbO_{2}+2H_{2}SO_{4}\rightarrow 2PbSO_{4}+2H_{2}O+O_{2}

The reaction of aluminium oxide with base and acids
\\Al_2O_{3}+2NaOH\rightarrow NaAlO_{2}\\ Al_2O_{3}+3H_{2}SO_{4}\rightarrow Al_{2}(SO_{4})_3+3H_{2}O

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manish

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