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Question

(a) What are amphoteric oxides? Gives two examples of amphoteric oxides.
(b) Choose the acidic oxides, basic oxide and neutral oxides from the following :
     $$ Na_2O : CO_2 : CO : SO_2 : MgO : N_2O : H_2O $$
(c) Which of the following are amphoteric oxides :
     $$ MgO , ZnO, P_2O_3, Al_2O_3,NO_ 2 $$


Solution

(a) Those metal oxides which show basic, as well as acidic behavior, are known as amphoteric oxides.
    Example: aluminium oxide and zinc oxide 

(b) Acidic oxide are $$ CO _2 , CO, SO_ 2$$ and $$N_ 2 O .$$ 
     Basic oxide are $$Na_ 2 O$$ and $$Mg O.$$
     Neutral oxide is $$H_ 2 O.$$ 

(c) Amphoteric oxides are $$ZnO$$ and $$Al_2 O_3.$$ 

Chemistry

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