Question

Peroxide bond is present in
A. $MgO$
B. $CaO$
C. $L{i_2}O$
D. $Ba{O_2}$

Answer 1

Hint: Any chemical molecule known as a peroxide is one in which two oxygen atoms are joined by a single covalent connection. As well as being employed as bleaching agents and other oxygen compounds, other organic and inorganic peroxides are also utilised.

Complete Step by Step Solution:
The peroxides of alkali metals and alkaline earth metals are potent bases because the peroxide ion is a strong hydrogen ion acceptor. Because of the reaction between the peroxide ion and water, which acts as a weak acid, the solutions of these peroxides are basic.
Due to the peroxide linkage in $Ba{O_2}$ , their oxidation state of $ - 1$,
$ + 2 + (2x) = 0$
$x = - 1$

Peroxide linkage is essentially an $O - O$ bond. The total number of electrons that an atom acquires or loses in order to create a chemical connection with another atom is referred to as the oxidation number, also known as the oxidation state. Barium peroxide is the name given to the chemical $Ba{O_2}$, which is a peroxide. A granular substance with a greyish-white appearance is barium peroxide. It cannot dissolve in water. Additionally, it speeds up the burning of combustible materials despite being a non-combustible material. Some mixtures of finely chopped flammable elements may be extremely explosive.
So, the correct option is D.

Additional Information: Ozone and barium peroxide react to form barium oxide and oxygen. This reaction, as described below, occurs in a liquid at a temperature of close to -80°C.
$Ba{O_2} + {O_3} \to Ba{({O_3})_2} + {O_2}$

Note: Barium peroxide is used as an oxidant in ammunition and can be used to bleach straw, plant fibres, and other animal products. In addition, barium is a known toxic substance. Additionally, it has a propensity to mix with the blood, making it more dangerous. Barium-containing hair colours must be avoided as a result.