The
bond angle in $\mathrm{H}_2 \mathrm{O}$ is $104.5^{\circ}$. This fact can be explained with the help of

• Correct answer
  A

  valence shell electron pair repulsion theory (VSEPR)
• B

  molecular orbital theory
• C

  presence of hydrogen bond
• D

  electronegativity difference between hydrogen and oxygen atoms

Solution

The
bond angle in $\mathrm{H}_2 \mathrm{O}$ is $104.5^{\circ}$ due to presence of two lone pair of electrons. This fact can be explained with the help of valence shell electron pair repulsion theory (VSEPR).

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