Question

The $H-C-H,H-N-H$, and $H-O-H$ bond angles (in degrees) in methane, ammonia and water are respectively, closest to.

• A. $109.5,104.5,107.1$
• B. $109.5,107.1,104.5$
• C. $104.5,107.1,104.5$
• D. $107.1,104.5,109.5$

Answer 1

The correct option is B $109.5,107.1,104.5$

Bond angle ${109.5}^{\circ }{107.1}^{\circ }{104.5}^{\circ }$
Order of repulsions: $lp-bp>bp-bp$, hence greater the no. of lone pairs smaller the bond angle (If hybridization of central atom is same).