Question
Pauling’s electronegativity values for elements are useful in predicting
A.
polarity of the molecules
B.
position in the emf series
C.
coordination numbers
D.
dipole moments
Answer :
polarity of the molecules
Solution :
Pauling’s electronegativity values are useful in determination of polarity of the bond in molecules. If electronegativity difference is zero, then the molecule is non-polar otherwise it is polar.
$${X_A} - {X_B} = 0.028\sqrt \vartriangle E$$
$${X_A}$$ and $${X_B}$$ are electronegativities of the atoms $$A$$ and $$B$$ respectively. While,
$$\vartriangle E = \,{\text{actual}}\,{\text{bond}}\,{\text{energy}}$$ $$ - \sqrt {{E_{A - A}} \times {E_{B - B}}} $$