Answer:
(A) O-S-O bond angle of SO₂ molecule = 119°
(B) F-B-F bond angle of BF₃ molecule = 120°
(C) Cl-S-Cl bond angle of SCl₂ molecule = 103°
(D) O-C-O bond angle of CO₂ molecule = 180°
(E) F-P-F bond angle of PF₃ molecule = 96.3°
(F) H-C-H bond angle of CH₄ molecule = 109.5°
Explanation:
Bond angle refers to the angle between two adjacent chemical bonds in a molecule. The bond angle is different for different molecular geometry.
The Valence shell electron pair repulsion theory predicts the molecular geometry and shape of the given molecule by the number of lone pairs on central atom and number of atoms bonded to central atom.
(A) SO₂ molecule
The number of atoms bonded to S = 2
Number of lone pairs on S = 1
<u>Therefore, the shape of SO₂ molecule is bent and the O-S-O bond angle is 119°.</u>
(B) BF₃ molecule
The number of atoms bonded to B = 3
Number of lone pairs on B = 0
<u>Therefore, the shape of BF₃ molecule is trigonal planar and the F-B-F bond angle is 120°.</u>
(C) SCl₂ molecule
The number of atoms bonded to S = 2
Number of lone pairs on S = 2
<u>Therefore, the shape of SCl₂ molecule is bent and the Cl-S-Cl bond angle is 103°.</u>
(D) CO₂ molecule
The number of atoms bonded to C = 2
Number of lone pairs on C = 0
<u>Therefore, the shape of CO₂ molecule is linear and the O-C-O bond angle is 180°.</u>
(E) PF₃ molecule
The number of atoms bonded to P = 3
Number of lone pairs on P = 1
<u>Therefore, the shape of PF₃ molecule is trigonal pyramidal and the F-P-F bond angle is 96.3°.</u>
(F) CH₄ molecule
The number of atoms bonded to C = 4
Number of lone pairs on C = 0
<u>Therefore, the shape of CH₄ molecule is tetrahedral and the H-C-H bond angle is 109.5°.</u>
