Question

Which of the following show amphoteric behaviour?
(A) Zn(OH)2
(B) Be0
(C)
Al2O3
(D)
Pb(OH)2​

Answer 1

Which of the following show Amphoteric behaviour ?

A.   Zn(OH)₂

B.   BeO

C.   Al₂O₃

D.  Pb(OH)₂

Answer : option (C) Al₂O₃

Explanation : Aluminium oxide is amphoteric in nature means, it shows acid as well as basic behaviour because it reacts with both acids and bases in aqueous solution.

These two examples show amphoteric nature of Al₂O₃..

example 1 : acidic behaviour of aluminium oxide.

Al₂O₃(aq)  + 2NaOH(aq)  ⇒ 2NaAlO₂(aq)  +  H₂O

example 2 : basic behaviour of aluminium oxide.

Al₂O₃(aq)  + 6HCl(aq)  ⇒ 2AlCl₃(aq)  +  3H₂O

Therefore Al₂O₃ show amphoteric behaviour. hence option (c) is correct choice.

Answer 2

Answer:

GIVEN ANSWER

Explanation:

Al203 is amphoteric substance.

this substance that can react with both acids and bases and salt and water is produced.

acid reaction:

Al2O3+ 6HCl⇒2Alcl3+3H20

Base reaction:

Al203+6NaOH⇒2Al(OH)3+3Na2O

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