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In the following sets reactants which tw...

In the following sets reactants which two sets best exhibits the amphoteric character of `Al_(2)O_(3)*xH_(2)O`?
Set 1: `Al_(2)O_(3)*xH_(2)O and OH^(-)`
Set 2: `Al_(2)O_(3)*xH_(2)O and H_(2)O` (aq)
Set 3: `Al_(2)O_(3)*xH_(2)O and H^(+)`(aq)
Set 4: `Al_(2)O_(3)*xH_(2)O and NH_(3)`(aq)

A

1 and 2

B

1 and 3

C

2 and 4

D

3 and 4

Text Solution

Verified by Experts

The correct Answer is:
B
Aluminium oxide is amphoteric oxide becouse it shows the properties of the both basic and acidic oxides. It react with bothe acids and bases to form salt and water.
`Al_(2)O_(3)*xH_(2)O+2NaOH to NaAlO_(2)+H_(2)O`
`Al_(2)O_(3)*xH_(2)O+HCl to AlCl_(3)+H_(2)O`
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