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Which of the following are amphoteric ox...

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)`

Text Solution

Verified by Experts

The correct Answer is:
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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