Question

Which one of the following is an amphoteric oxide?
 A.$S{O_2}$
 B.${B_2}{O_3}$
 C.$ZnO$
 D.$N{a_2}O$

Answer 1

Hint: We have to know that, in science, an amphoteric compound is an atom or particle that can respond both as a corrosive and as a base. Metal oxide, which responds with the two acids just as bases to deliver salts and water are known as amphoteric oxides. Instances of amphoteric substances incorporate water, proteins, amino acids, and many metal oxides and hydroxides.

Complete answer:
When $S{O_2}$ happens in the climate essentially from the consuming of petroleum derivatives, yet additionally normally from fountains of liquid magma ejections. Breathing $S{O_2}$ can harm the lungs. $S{O_2}$ in the environment can break down in water, framing sulfuric corrosiveness. At the point when it tumbles to the ground it's a sort of precipitation called corrosive downpour.
Therefore, option (A) is incorrect.
We have to know that Boric oxide ${B_2}{O_3}$ frames hydrolytically shaky concretes with polyacrylic and phosphonic acids, which are speedy setting [one to five mins with poly(vinylphosphonic acid)]. Since ${B_2}{O_3}$ is acidic, a corrosive base response does not occur.
Therefore, option (B) is incorrect.
We have to know that zinc oxide $ZnO$ can react with acid and base to produce salt and water. So that it acts as amphoteric oxide.
$ZnO + 2HCl \to ZnC{l_2} + {H_2}O$
$ZnO + 2NaOH \to N{a_2}Zn{O_2} + {H_2}O$
Therefore, option (C) is correct.
Sodium oxide $N{a_2}O$ is a basic unequivocally essential oxide. It is fundamental since it contains the oxide particle, which is a solid base with a high propensity to join with hydrogen particles. Response with water: Sodium oxide responds exothermically with cold water to deliver sodium hydroxide arrangement.
Therefore, option (D) is incorrect.

Note:
We have to know that, any oxides respond, that is, they are amphoteric, with the two acids and bases. Amphoteric oxide, for example, is $A{l_2}{O_3}$ . Amphoteric oxides are found in the lighter components of Groups $2$ and $13$ , a portion of the d-block components, and the heavier components of Groups $14$ and $15$ .