Question

# Which of the following oxides is not expected to react with sodium hydroxide?

A
BeO
B
B2O3
C
CaO
D
SiO2

Solution

## The correct option is A $$CaO$$$$CaO$$ is not expected to react with $$NaOH$$ because $$NaOH$$ is a base and it can only react with either an acidic oxide or an amphoteric oxide. Among given options $$BeO$$ is an amphoteric oxide while $$B_2O_3$$ and $$SiO_2$$ are acidic oxides.Thus, all of them react with $$NaOH$$ to form salts.$$CaO$$, on the other hand, is a basic oxide and hence it will not react with $$NaOH$$.Chemistry

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