Oxidation state of Pb in PbO2 is +4.
Oxidation state of Pb in PbCl2 is +2.
Oxidation state of Pb in Pb2O is +1.
Oxidation state of Pb in Pb4O3 is +6/4.
Hence option A. PbO2 is correct.
Hope this helps, have a nice day!
Can you please give me more details so I can help you
Mercury is the smallest and closest plant to the sun
Answer: The correct option is 4.
Explanation: All the options will undergo some type of radioactive decay processes. There are 3 decay processes:
1) Alpha decay: It is a decay process in which alpha particle is released which has has a mass number of 4 and a charge of +2.
![_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha](https://tex.z-dn.net/?f=_Z%5EA%5Ctextrm%7BX%7D%5Crightarrow%20_%7BZ-2%7D%5E%7BA-4%7D%5Ctextrm%7BY%7D%2B_2%5E4%5Calpha)
2) Beta-minus decay: It is a decay in which a beta particle is released. The beta particle released has a mass number of 0 and a charge of (-1).
![_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta](https://tex.z-dn.net/?f=_Z%5EA%5Ctextrm%7BX%7D%5Crightarrow%20_%7BZ%2B1%7D%5EA%5Ctextrm%7BY%7D%2B_%7B-1%7D%5E0%5Cbeta)
3) Beta-plus decay: It is a decay process in which a positron is released. The positron released has a mass number of 0 and has a charge of +1.
![_Z^A\textrm{X}\rightarrow _{Z-1}^A\textrm{Y}+_{+1}^0\beta](https://tex.z-dn.net/?f=_Z%5EA%5Ctextrm%7BX%7D%5Crightarrow%20_%7BZ-1%7D%5EA%5Ctextrm%7BY%7D%2B_%7B%2B1%7D%5E0%5Cbeta)
For the given options:
Option 1: This nuclei will undergo beta-plus decay process to form ![_{25}^{53}\textrm{Mn}](https://tex.z-dn.net/?f=_%7B25%7D%5E%7B53%7D%5Ctextrm%7BMn%7D)
![_{26}^{53}\textrm{Fe}\rightarrow _{25}^{53}\textrm{Mn}+_{+1}^0\beta](https://tex.z-dn.net/?f=_%7B26%7D%5E%7B53%7D%5Ctextrm%7BFe%7D%5Crightarrow%20_%7B25%7D%5E%7B53%7D%5Ctextrm%7BMn%7D%2B_%7B%2B1%7D%5E0%5Cbeta)
Option 2: This nuclei will undergo beta-minus decay process to form ![_{80}^{198}\textrm{Hg}](https://tex.z-dn.net/?f=_%7B80%7D%5E%7B198%7D%5Ctextrm%7BHg%7D)
![_{79}^{198}\textrm{Au}\rightarrow _{80}^{198}\textrm{Hg}+_{-1}^0\beta](https://tex.z-dn.net/?f=_%7B79%7D%5E%7B198%7D%5Ctextrm%7BAu%7D%5Crightarrow%20_%7B80%7D%5E%7B198%7D%5Ctextrm%7BHg%7D%2B_%7B-1%7D%5E0%5Cbeta)
Option 3: This nuclei will undergo a beta minus decay process to form ![_{56}^{137}\textrm{Ba}](https://tex.z-dn.net/?f=_%7B56%7D%5E%7B137%7D%5Ctextrm%7BBa%7D)
![_{55}^{137}\textrm{Cs}\rightarrow _{56}^{137}\textrm{Ba}+_{-1}^0\beta](https://tex.z-dn.net/?f=_%7B55%7D%5E%7B137%7D%5Ctextrm%7BCs%7D%5Crightarrow%20_%7B56%7D%5E%7B137%7D%5Ctextrm%7BBa%7D%2B_%7B-1%7D%5E0%5Cbeta)
Option 4: This nuclei will undergo an alpha decay process to form ![_{85}^{216}\textrm{At}](https://tex.z-dn.net/?f=_%7B85%7D%5E%7B216%7D%5Ctextrm%7BAt%7D)
![_{87}^{220}\textrm{Fr}\rightarrow _{85}^{216}\textrm{At}+_2^4\alpha](https://tex.z-dn.net/?f=_%7B87%7D%5E%7B220%7D%5Ctextrm%7BFr%7D%5Crightarrow%20_%7B85%7D%5E%7B216%7D%5Ctextrm%7BAt%7D%2B_2%5E4%5Calpha)
Hence, the correct option is 4.