Which of the following statement is/are correct for $H_2O_2$?

Which of the following statements is correct?

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 $R$.

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

The structure of $H_2O_2$ is

The normality of $10$ $V$ (volume) hydrogen peroxide is: