Predict the shape and bond angles in the following molecules :a. CF4b.

1.	Predict the shape and bond angles in the following molecules :a. CF4b. NF3c. HCN d. H2S
Answer» a. CF₄: There are four bond pairs on the central atom. Hence, Shape of CF₄ is tetrahedral and F-C-F bond angle is 109° 28′. b. NF₃ : There are three bond pairs and one lone pair on the central atom. Hence, Shape of NF₃ is trigonal pyramidal and F-N-F bond angle is less than 109° 28′. c. HCN : There are two bond pairs on the central atom. Hence, Shape of HCN is linear and H-C-N bond angle is 180°. d. H₂S : There are two bond pairs and two lone pairs on the central atom. Hence, Shape of H₂S is bent or V-shaped and H-S-H bond angle is slightly less than 109° 28′.

Predict the shape and bond angles in the following molecules :a. CF4b. NF3c. HCN d. H2S

Answer»

a. CF₄:

There are four bond pairs on the central atom.

Hence,

Shape of CF₄ is tetrahedral and F-C-F bond angle is 109° 28′.

b. NF₃ :

There are three bond pairs and one lone pair on the central atom.

Hence,

Shape of NF₃ is trigonal pyramidal and F-N-F bond angle is less than 109° 28′.

c. HCN :

There are two bond pairs on the central atom.

Hence,

Shape of HCN is linear and H-C-N bond angle is 180°.

d. H₂S :

There are two bond pairs and two lone pairs on the central atom.

Hence,

Shape of H₂S is bent or V-shaped and H-S-H bond angle is slightly less than 109° 28′.