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Q.

Among the following, amphoteric oxide is formed by which element

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a

C

b

Si

c

Pb

d

Ge

answer is D.

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Detailed Solution

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Oxides in higher oxidation states of elements are generally more acidic than those in lower oxidation states. The dioxides — CO2, SiO2 and GeO2 are acidic, whereas SnO2 and PbO2 are amphoteric in nature. Among monoxides, CO is neutral, GeO is distinctly acidic whereas SnO and PbO are amphoteric.

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