$A$ commercial sample of $H_{2}O_{2}$ is labeled as $10 \text{ V}$. Its percentage strength is nearly:

Given below are two statements :
Statement $I$ : $H_2O_2$ is used in the synthesis of Cephalosporin.
Statement $II$ : $H_2O_2$ is used for the restoration of aerobic conditions to sewage wastes.
In the light of the above statements,choose the most appropriate answer from the options given below :

Which one of the following reactions does not form a gaseous product?

$A$ commercial sample of $H_2O_2$ marked as $100$ volume hydrogen peroxide means:

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 last drop of water can be removed from $H_2O_2$ by