What product is formed when $I_2$ reacts with $H_2O_2$ in a basic medium?

The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are

The $pH$ of a solution of $H_2O_2$ is $6.0$. Some chlorine gas is bubbled into this solution. Which of the following is correct?

The correct statements about $H_2O_2$ are:
$A$. Used in the treatment of effluents.
$B$. Used as both oxidising and reducing agents.
$C$. The two hydroxyl groups lie in the same plane.
$D$. Miscible with water.
Choose the correct answer from the options given below:

In the laboratory, $H_2O_2$ is prepared by:

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.