Which of the following is/are the preparation or manufacture of `H_(2)O_(2)`
1) Mercks's process `" "` 2) Thenard's process
3) Electrolysis of 50% of `H_(2)SO_(4)" 4) "` Auto-oxidation of 2-alkyl anthraquinol
5) Oxidation of isopropyl alcohol

Options

A. `2 Fe(CN)_(6)^(4-) + 2H^(+) + H_(2) O_(2) rarr 2Fe (CN)_(6)^(3-) + 2H_(2) O`
B. `O_(3)+ H_(2)O_(2) rarr 2O_(2) + H_(2) O`
C. `Mn^(2+)+ H_(2)O_(2)rarr Mn^(4+) + 2OH^(-)`
D. `PbS+ 4H_(2)O_(2) rarr PbSO_(4)+ 4H_(2)O`

Answer

B

Explanation

In the reducing nature of `H_(2) O_(2)` the oxidation number of O atom is changed from -1 to 0 .