107degree due in more s character orbital occupied by lone pair which repell bond pair hence angles bw. bond pair get reduce

Bond Angle of NH3

Explanation:
- The bond angle of NH3, which is ammonia, is approximately 107 degrees.
- This bond angle is the angle between the hydrogen-nitrogen-hydrogen atoms in the ammonia molecule.

Reasoning:
- The bond angle in NH3 is less than the ideal 109.5 degrees of a perfect tetrahedral angle.
- This is due to the lone pair of electrons on the nitrogen atom.
- The lone pair of electrons takes up more space than bonding pairs, causing the hydrogen atoms to be pushed closer together, resulting in a slightly smaller bond angle.

Significance:
- The bond angle in NH3 affects the molecule's shape and properties.
- The bent shape of ammonia allows it to form hydrogen bonds, which are responsible for its high boiling point and solubility in water.
- Understanding the bond angle of NH3 is crucial in predicting its behavior in various chemical reactions.