Consider: (I) NO and CO are neutral oxides. (II) Pb3O4 is a mixed oxide of PbO and PbO2. (III) Na2O2 gives H2O2 with cold dilute acid. (IV) BaO2 contains the superoxide ion. The number of correct statements is

JEE Advanced levelSingle correct optionDifficulty 3 of 3pn199

Consider: (I) $NO$ and $CO$ are neutral oxides. (II) $Pb X_{3} O X_{4}$ is a mixed oxide of $PbO$ and $PbO X_{2}$ . (III) $Na X_{2} O X_{2}$ gives $H X_{2} O X_{2}$ with cold dilute acid. (IV) $BaO X_{2}$ contains the superoxide ion. The number of correct statements is

(I) true. (II) true:

Pb X_{3} O X_{4}

2 PbO \cdot PbO X_{2}

. (III) true:

Na X_{2} O X_{2} + H X_{2} SO X_{4} Na X_{2} SO X_{4} + H X_{2} O X_{2}

. (IV) false:

BaO X_{2}

contains the peroxide ion

O X_{2} X^{2 -}

. So three are correct.