The dihedral angles in gaseous and solid phases of $\mathrm{H}_2 \mathrm{O}_2$ molecule respectively are

• A

  $90.2^{\circ}, 111.5^{\circ}$
• Correct answer
  B

  $101.9^{\circ}, 94.8^{\circ}$
• C

  $111.5^{\circ}, 90.2^{\circ}$
• D

  $94.8^{\circ}, 101.9^{\circ}$

Solution

The difference in angles is due to difference in the intermolecular forces.

Hence, the correct answer is option: 'B'.