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NTA AbhyasNTA Abhyas 2020The p-Block Elements - Part2
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Solution:
The basicity of the dioxide alters in the order
CO2<SiO2<GeO2<SnO2<PbO2
The basicity increases on moving down the group. Thus, CO2 and SiO2 are purely acidic. GeO2 is not as strongly acidic as SiO2 . It is weakly acidic and weakly basic. SnO2 and PbO2 are definitely amphoteric.