MolSynapsequestion bank

MolSynapse / Question bank / s-Block Elements / Oxides, peroxides, superoxides and hydroxides

NEET levelSingle correct optionDifficulty 1 of 3sb116

The oxidation state of oxygen in potassium superoxide, $KO X_{2}$ , is:

A $- 1$
B $- 2$
C $0$
D $- \frac{1}{2}$

Answer: D

In

KO X_{2}

potassium is

+ 1

, so the two oxygen atoms together carry

- 1

. Each oxygen therefore has oxidation state

- \frac{1}{2}

(the ion is

O X_{2} X^{-}

).

Practice s-Block Elements More on Oxides, peroxides, superoxides and hydroxides

Previous questionNext question

More questions on Oxides, peroxides, superoxides and hydroxides

When lithium is burnt in air, the main oxygen-containing product is: NEET level
Among the hydroxides of alkali metals, the strongest base is: NEET level
The chemical formula of slaked lime is: NEET level
Sodium peroxide reacts with ice-cold water to form: JEE Main level
Potassium superoxide absorbs carbon dioxide as 4KO2 + 2CO2 -> 2K2CO3 + 3O2. The number of moles of O2 released per mole of CO2 absorbed is: JEE Main level
Assertion (A): Be(OH)2 dissolves both in dilute HCl and in aqueous NaOH. Reason (R): Be(OH)2 is amphoteric. JEE Main level