Assertion : Zinc oxide amphoteric in nature.Reason : Zinc oxide react...
Assertion: Zinc oxide is amphoteric in nature.
Reason: Zinc oxide reacts with both acids and bases.
Explanation:
Zinc oxide (ZnO) is a compound that is commonly used in various applications such as sunscreens, ointments, and as a pigment in paints. It is known to exhibit amphoteric behavior, which means it can react with both acids and bases.
When zinc oxide reacts with an acid, it undergoes a neutralization reaction, resulting in the formation of a salt and water. For example, when zinc oxide reacts with hydrochloric acid (HCl), it forms zinc chloride (ZnCl2) and water (H2O), as shown by the following equation:
ZnO + 2HCl -> ZnCl2 + H2O
This reaction demonstrates that zinc oxide can react with acids, indicating its amphoteric nature.
Similarly, when zinc oxide reacts with a base, it forms a salt and water through a neutralization reaction. For instance, when zinc oxide reacts with sodium hydroxide (NaOH), it produces zincate ion (Zn(OH)4^-2) and water (H2O), as shown by the following equation:
ZnO + 2NaOH -> Na2[Zn(OH)4] + H2O
Again, this reaction confirms that zinc oxide can react with bases, further supporting its amphoteric nature.
Therefore, the assertion that zinc oxide is amphoteric in nature is true, and the reason provided - zinc oxide reacts with both acids and bases - is the correct explanation for this assertion.
In conclusion, zinc oxide exhibits amphoteric behavior as it can react with both acids and bases. This property makes it useful in various applications, including as a pH regulator, antiseptic, and in the production of rubber and ceramics.
Assertion : Zinc oxide amphoteric in nature.Reason : Zinc oxide react...
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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