The bond angle $H-O-O$ in $H_2O_2$ in the gaseous phase is (in $^{\circ}$)

Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases $H_2O_2$ acts as a reducing agent in acidic medium?

$A$ commercial sample of hydrogen peroxide is labelled as $10$ volume. Its percentage strength is nearly ............... $\%$

Give the reaction of $I_2$ with $H_2O_2$ in the presence of a basic medium.

In which of the following reactions is $H_2O_2$ acting as a reducing agent?

Describe the preparation of Hydrogen peroxide and write its physical properties.