Question

Which of the following is not peroxide?

• A. $NaH{O}_2$
• B. $Ba{O}_2$
• C. $N{a}_2{O}_2$
• D. $Pb{O}_2$

Answer 1

Answer: (D)

$Pb{O}_2$

Here answer is option $D$.

$Pb{O}_2$ are not true peroxide because they do not liberate $H_2{O}_2$ on treatment with dilute acids.

Lead (1V) oxide and the lead atom shares its 4 electrons 2 each with oxygen atoms. In Peroxide there a bond sharing of two oxygen atoms as in:

Hydrogen Peroxide

$H-O-O-H$

Water is an oxide

$H-O-H$

Likewise ${PbO}_2$ is an oxide $Pb$ has a valency 4

$O=Pb=O$