Regarding the molecular structure and geometry of hydrogen peroxide (), which of the following state — Hydrogen Chemistry Question

💡 Solution & Explanation

$H_2O_2$ exhibits a non-planar, open-book structure. Due to hydrogen bonding in the solid state packing, the dihedral angle is compressed to $90.2^\circ$, whereas in the gas phase, minimizing lone-pair repulsions dictates a wider dihedral angle of $111.5^\circ$.