Question

0.2:

The bond angles of H20 and NH3 are not 109.5" like that of CH4, although O and N
atoms are sp hybridized is like carbon. Give reason.​

Answer 1

Answer: due to bond pair - lone pair and lone pair -lone pair repulsion

Step-by-step explanation:

In
`NH_3`, nitrogen is the central atom and there are 3 Hydrogens as monovalent atoms. The number of electron pairs is 4 that means the hybridization will be
`sp^3` and geometry of the molecule will be pyramidal as there are three bond pairs and one lone pair.The bond angle for pyramidal geometry is 107°. The bond angle reduces due to lone pair bond pair repulsions.

In
`H_2O`, oxygen is the central atom and there are 2 Hydrogens as monovalent atoms. The number of electron pairs is 4 that means the hybridization will be
`sp^3` and geometry of the molecule will be bent as there are two bond pairs and two lone pairs.The bond angle for pyramidal geometry is 104.5°.The bond angle reduces further due to greater lone pair-lone pair repulsions.