A) \[Pb{{O}_{2}}\]
B) \[Ba{{O}_{2}}\]
C) \[Mn{{O}_{2}}\]
D) \[N{{O}_{2}}\]
Correct Answer: B
Solution :
True peroxides are those which liberate hydrogen peroxide on treatment with dilute acids. Among the given, only \[Ba{{O}_{2}}\] liberates \[{{H}_{2}}{{O}_{2}}\]with dilute acid, hence it is a true peroxid. \[Ba{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}BaS{{O}_{4}}\downarrow +{{H}_{2}}{{O}_{2}}\]
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