MCQ
The species that do not contain peroxide linkage are :-
- ✓$PbO_2$
- B$H_2O_2$
- C$SrO_2$
- D$BaO_2$
✓
Answer
Correct option: A.
$PbO_2$
a
Metallic oxides which on treatment with dilute acids produce hydrogen peroxide are called peroxides. All peroxides contain a peroxide ion $\left(\mathrm{O}_{2}\right)^{2-}$ having the structure $-\mathrm{O}-\mathrm{O}-. \mathrm{PbO}_{2}$ does not contain a peroxide ion $\left(\mathrm{O}_{2}\right)^{2-}$ and it can not be called as peroxides.
Metallic oxides which on treatment with dilute acids produce hydrogen peroxide are called peroxides. All peroxides contain a peroxide ion $\left(\mathrm{O}_{2}\right)^{2-}$ having the structure $-\mathrm{O}-\mathrm{O}-. \mathrm{PbO}_{2}$ does not contain a peroxide ion $\left(\mathrm{O}_{2}\right)^{2-}$ and it can not be called as peroxides.
$\mathrm{PbO}_{2}$ contains $\mathrm{O}^{2-}$ ions and Option $(\mathrm{A}) \mathrm{Pb}$ is $+4,$ whereas $(\mathrm{B}),(\mathrm{C})$ and (D) contains $[\mathrm{O}-\mathrm{O}]^{2-}$ ions (peroxide ions).
Thus Option A is correct.
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