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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:

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

with strong base

N a O H

Here

acts as an acid and forms a conjugate base

which further forms a salt.
Now the reaction of

A l 2 O 3

with strong acid

H C l

is as follows;

Hence,

is an amphoteric oxide.
Hence, the correct answer is option 3.

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