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Question

Which of the following oxides is amphoteric in nature?


A

CaO

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B

CO2

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C

SiO2

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D

SnO2

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Solution

The correct option is D

SnO2


The explanation for the correct option:

(D) SnO2:

  • Amphoteric oxides are metal oxides that react with acids and bases to form salts and water.
  • Tin oxide SnO2 is an amphoteric in nature because it can react with both acid and base to form salts and water.
  • The reaction of Tin oxide with hydrochloric acid HCl is as follows:

SnO2+4HClCl2+SnCl2+2H2O

  • The reaction of Tin oxide with potassium hydroxide KOH is as follows:

SnO2+2KOHK2SnO3+H2O

The explanation for the incorrect option:

(A) CaO:

Calcium oxide CaO is basic in nature, not amphoteric.

(B) CO2:

Carbon dioxide CO2 is acidic in nature, not amphoteric.

(C) SiO2:

Silicon dioxide SiO2 is acidic in nature, not amphoteric.

Therefore, the correct option is (D). SnO2 is amphoteric in nature.


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