Question

The colour of the residue when $Pb{O_2}$ decomposes to PbO and ${O_2}$ .
(A) pink
(B) yellow
(C) green
(D) white

Answer 1

Hint: $Pb{O_2}$ is known as lead oxide or plumbic oxide. It is insoluble in water or alcohol. It is a dark brown crystalline powder. It is also called as anhydrous plumbic acid. Its oxidation state is $ + 4$.

Complete answer:
We know that lead oxide is a compound which is insoluble in water or dark alcohol. The reaction take place as follows :
$Pb{O_2} \to PbO + {O_2}$
Here, the oxygen gas is evolved in the reaction
The colour of the residue obtained is yellow.

Hence, option B is the correct option..

Additional information:
Uses of lead(IV) oxide are as follows
1.It is used to manufacture rubber substitutes.
2.It is used in making explosives
3.It is used as an oxidising agent for manufacture of dyes
4.It is used as an analytical reagent
5.It is used in making lightning arresters.
6.It is used in electroplating copper.
7.It is used in lead storage batteries
8.It is used in textiles.
9.It is used in electroplating copper.
Lead dioxide is an amphoteric compound with prevalent acidic properties. It dissolves in strong bases to form the hydroxyl plumbate ion. It generally stays in two oxidation states . It is also found as a natural occurring mineral. It is produced commercially by several methods.

Note: Lead (IV) oxide is generally prepared by the reaction of lead oxide $(P{b_3}{O_4})$ with dilute nitric acid. Also lead monoxide occurs in two polymorphs. It is having a tetragonal crystal structure and an orthorhombic crystal structure. Lead at room temperature doesn’t react with air. It exists in two crystalline forms. It has got various applications in electrochemistry.