Question

plz answer this question

Answer 1

b)BF3
Since there is no unpaired electrons or lone pairs on boron atom in BF3, molecular geometry
and electron pair geometry of this substance is trigonal planar. The maximum possible angle
between three bonds in such planar molecule is 120°.
There are four bonds in CH4, so the maximum possible angle between them is 109.5° and
molecular geometry is tetrahedral. Angles between covalent bonds are 106.7°
in NH3 and 96.3 °in PF3.