Question

Which of the molecules and ions polar bonds? (a) ClF5 (b) ClO2 −(c) TeCl4 2−(d) PCl3 (e) SeF4 (f) PH2 −

Answer 1

(a) ClF₅ - Polar

molecular geometry of ClF₅ is squre pyramidal with asymmetrical charge distribution around central atom therefore molecule is polar.

(b) ClO₂^- - polar

Molecular geometry is bent like water thus it is polar.

(c) TeCl₄^2- - polar

if we draw lewis strucure of moleule has lone pair of electron therefore it is not planar and also electronegativity of Te and Cl far apart and bond are polar since they are not symmetric and molecule are polar.

(d) PCl₃  - polar

P has lone pair of electron and Cl have three lone pair of electron. molecule is not symmetrical . shared electron tend to near toward Cl. chlorine atom shifted toward one side center atom of molecule. net dipole effect is created and molecule become polar.

(e) SeF₄  - polar

geometry of molecule is trigonal bipyramidal the lone pair occupy the equtorial possition this make molecule see saw like the Fe - S bond not arranged in symmetry therefore polarity not cancel out and molecule is polar.