In which of the following reactions is $H_2O_2$ acting as a reducing agent?

Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium?

Compare the structures of $H_2O$ and $H_2O_2$.

Fill in the blanks:
$(1)$ $H_2O_2$ acts as an antiseptic, then it is known as ......... in the market.
$(2)$ Cation exchange resin is a ......... group containing organic molecule.
$(3)$ The ionic radius of $H^+$ ions and that of other ions is ......... $pm$ and ......... $pm$ respectively.
$(4)$ ......... group elements give salt-like hydrides.

The concentration of commercial $H_2O_2$ is $3.125 \ M$,then its grade is $..........$ volume.

Which of the following produces $H_2O_2$ on hydrolysis?