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Question

Select correct statement about CO2,SiO2,GeO2,SnO2 and PbO2 :

A
CO2 and SiO2 are acidic, SnO2 is amphoteric and PbO2 is an oxidising agent.
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B
PbO2 is converted to Pb(NO3)2 on reaction with HNO3.
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C
both (a) and (b) are correct.
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D
none of the above is correct.
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Solution

The correct option is C both (a) and (b) are correct.
CO2 and SiO2 are acidic due to electron deficiency.
SnO2 is amphoteric in nature as it can work as acid as well as base.
PbO2 is an oxidising agent because as move down the group oxidation state II become more stable so Pb II is more stable than Pb IV has due to this reason PbO2 has tendency to get electron and works as oxidising agent.

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