Which of the following is $NOT$ true for the electrolytic preparation of $H_2O_2$?

The environmentally friendly chemical used nowadays for bleaching paper in the presence of a suitable catalyst is

Which of the following can be used to prevent the decomposition of $H_{2}O_{2}$?

The compound which does not possess a peroxide linkage is

Decolourisation of acidified potassium permanganate occurs when $H_2O_2$ is added to it,this is due to

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R.$
Assertion $A:$ The dihedral angle in $H_{2}O_{2}$ in the gaseous phase is $90.2^{\circ}$ and in the solid phase is $111.5^{\circ}$.
Reason $R:$ The change in dihedral angle in the solid and gaseous phases is due to the difference in the intermolecular forces.
Choose the most appropriate answer from the options given below for $A$ and $R$.