MolSynapsequestion bank

MolSynapse / Question bank / Basic Inorganic Nomenclature and Oxidation Number / Peroxides, superoxides and polyatomic ions

JEE Main levelOne or more correct optionsDifficulty 2 of 3bn032

Select the correct statements about the oxidation number of oxygen (metals in their usual oxidation states).

AO in $KO X_{2}$ is $- \frac{1}{2}$
BO in $KO X_{3}$ is $- \frac{1}{3}$
CO in $Cs X_{2} O$ is $- 1$
DO in $BaO X_{2}$ is $- 1$

Answer: A, B, D

BaO X_{2}

: Ba is

+ 2

, so each O is

- 1

.

KO X_{2}

: each O is

- \frac{1}{2}

.

KO X_{3}

: each O is

- \frac{1}{3}

.

Cs X_{2} O

is a normal oxide with O at

- 2

, so the statement that it is

- 1

is wrong.

Practice Basic Inorganic Nomenclature and Oxidation Number More on Peroxides, superoxides and polyatomic ions

Previous questionNext question

More questions on Peroxides, superoxides and polyatomic ions