Question

Q.No: 10
Which of the following statements is not true about BF3 molecule?
A) The structure is trigonal planar.
B) The principal axis of rotation is C3
c) It has one vertical plane of symmetry.
D) It has one horizontal plane of symmetry.
CE) It has three C2 elements of symmetry,​

Answer 1

Explanation:

BF3 is a planar molecule with all its 4 atoms lying in the same plane. The axis perpendicular to the plane and passing through atom B is the principal axis which is C3. Plane of the molecule is sigma h. There are 3 C2 axis in the plane of BF3 each passing through three B-F . There are three vertical mirror planes passing through 3 C2 axis which is 3sigma v. There is an improper rotation also which is 2S3 means rotation by C3(principal axis) followed by sigma h (plane of the molecule). So BF3 has 6 symmetry elements including E,2C3,3C2,3sigma v,1sigma h,2S3.

incorrect statement (C)

there are three vertical plane mirror

Answer 2

Answer:

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