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Question

Which of the following oxides will dissolve in H2SO4 ?


A

B2O3

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B

Al2O3

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C

CO2

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D

SiO2

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Solution

The correct option is B

Al2O3


B2O3,CO2,SiO2 are acidic oxides so they do not react with sulphuric acid under normal conditions, whereas Al2O3 is an amphoteric oxide, meaning it can react with both acids and bases.


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