Which of the following are amphoteric oxides?A. `CO_(2)` and `SiO_(2)`B. `SiO_(2)` and `GeO_(2)`C. `GeO_(2)` and `SnO_(2)`D. `SnO_(2)` and `PbO_(2)`

Which of the following are amphoteric oxides?A. `CO_(2)` and `SiO_(2)`

1.	Which of the following are amphoteric oxides?A. `CO_(2)` and `SiO_(2)`B. `SiO_(2)` and `GeO_(2)`C. `GeO_(2)` and `SnO_(2)`D. `SnO_(2)` and `PbO_(2)`
Answer» Correct Answer - D `SnO_(2)` and `PbO_(2)` dissolve in concentrated alkalis giving stannates and plumbates: `SnO_(2) + 2NaOH rarr Na_(2)SnO_(3) + H_(2)O` `PbO_(2) + 2NaOH rarr Na_(2)PbO_(3) + H_(2)O` Both are insoluble in acids except when a complexing agent such as `F^(-)` or `Cl^(-)` is present.

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Which of the following are amphoteric oxides?A. `CO_(2)` and `SiO_(2)`B. `SiO_(2)` and `GeO_(2)`C. `GeO_(2)` and `SnO_(2)`D. `SnO_(2)` and `PbO_(2)`

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