The last traces of water present in $H_2O_2$ can be removed by:

The normality of $30$ volume $H_2O_2$ is (in $N$)

In the gas phase,the $H-O-O-H$ dihedral angle in $H_{2}O_{2}$ is: (in $^{\circ}$)

Which substance does not speed up the decomposition of $H_2O_2$?

Assertion $:$ Amount of $H_2O_2$ in a sample can be determined by treating $H_2O_2$ solution with $KI$ and followed by titration of liberated $I_2$ with sodium thiosulphate.
Reason $:$ In this titration,an intense blue colour appears which disappears at the end point.

$H_2O_2$ reduces $K_4[Fe(CN)_6]$ in which of the following conditions?