Question

Select the odd one out with proper reason
ZnO,CaO,CuO,PbO

Answer 1

your answer is PbO

your answer is PbObcz Pb is plumbum which is also called mirror and there is not any formula like plumbum oxide thats why answer is PbO.

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Answer 2

Answer:

Explanation:

I think it should be CaO because calcium is of s-block and other oxides are from d-block.