Question

The species, having bond angles of 120 degrees

is

1) BCl3 2) PH3 3)CIF3 4) NCl3​

Answer 1

Answer:

1) BCl3.…....sp2 hybridisation

Answer 2

Answer:

Among the given species, the bond angle of BCl₃ is equal to 120°.

Therefore, the option (1) is correct.

Explanation:

• In BCl₃ molecule has sp² hybridization. The geometry and the shape of  BCl₃ molecule is trigonal planar. Therefore, the bond angle Cl-B-Cl is equal to 120°.
• In PH₃ molecule has sp³ hybridization. The geometry of molecule is tetrahedral. But because of the presence of one lone pair, the shape becomes pyramidal. The bond angle is less than 109.4°. It is around 93.5°.
• In ClF₃ molecule, the hybridization is sp³d. The geometry of the molecule is trigonal bipyramidal. The molecule is T-shaped because of the presence of two lone pairs at equatorial positions. The bond angle is 87.5° and 175°.
• IN NCl₃ molecule, the hybridization is sp³. The geometry of molecule is tetrahedral. But because of the presence of one lone pair, the shape becomes pyramidal. The bond angle is less than 109.4°. It is around 107.1° because of presence of large chlorine molecules the bond angle increase in the comparison of other pyramidal structures such as H₂O. PH₃ etc.