Question

25. Which statement about amphoteric oxides is not correct?
A)
They dissolve in water.
B)They are formed only by metals.
C)They react with aqueous sodium hydroxide to give salts.
D)They react with aqueous acids to give salts.​

Answer 1

Answer:

C and D are the correct statements about amphoteric oxides

Answer 2

The statement that is not correct about amphoteric oxides is B) They are formed only by metals.

• Amphoteric oxides are a type of oxide that, depending on the circumstances, can function as both an acid and a base. This implies that they can create salts by reacting with both acids and bases.

• Amphoteric oxides act as a base and produce salt and water when they interact with an acid. As an illustration, when aluminium oxide (Al2O3) and hydrochloric acid (HCl) react, aluminium chloride (AlCl3) and water (H2O) are produced.

Al₂O₃ + 6HCl → 2AlCl₃ + 3H₂O

• Amphoteric oxides act as an acid and produce salt and water when they interact with a base. For instance, when zinc oxide (ZnO) and sodium hydroxide (NaOH) react, sodium zincate (Na2ZnO2) and water (H2O) are the products.

ZnO + 2NaOH + H₂O → Na₂ZnO₂ + 2H₂O

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