Q.

Aluminium oxide is:


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a

Basic oxide

b

Acidic oxide

c

Amphoteric oxide

d

Neutral oxide 

answer is C.

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Detailed Solution

Concept:Question Image is the chemical formula for aluminium oxide, an inorganic chemical reagent. Alpha-alumina, alumina, alundum, and aloxide are some of their alternate names. Aluminium oxide may react with both acids and bases. These substances are known as amphoteric compounds because they have the ability to react with both acids and bases. .
This metal oxide can act as acid or base depending on the reaction conditions.
For example, consider the reaction of Question Imagewith strong base NaOH
Question ImageHere Question Imageacts as an acid and forms a conjugate base Question Image which further forms a salt.
Now the reaction of A l 2 O 3 with strong acid HCl is as follows;
Question ImageHence, Question Imageis an amphoteric oxide.
Hence, the correct answer is option 3.
 
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