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Amphoteric Metals

NH 3 and H 2 ...

Question

NH₃and H₂O are amphoteric oxides. How can you say so ??

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Solution

Yes NH3 is a weak base.

An amphoteric oxide is an oxide that can act both as an acid and as a base.

H2O + NH3 → NH4+ + OH-

H2O + HCl → H+ + Cl-

Hence, we NH3 and H20 are amphoteric oxides.

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Q. (a) What are amphoteric oxides? Give two examples of amphoteric oxides.
(b) Choose the acidic oxides, basic oxides and neutral oxides from the following:
Na₂O; CO₂; CO; SO₂; MgO; N₂O; H₂O.
(c) Which of the following are amphoteric oxides:
MgO, ZnO, P₂O₃, Al₂O₃, NO₂

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C O, C O_{2}, N a_{2} O, P b O_{2}, P b O, S n O, G e O_{2}, G e O

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