Question

question: Which bond is polar?

A bond between N and Cl

A bond between Br and Br

A bond between P and O

A bond between H and Te

please help thanks!

Answer 1

Answer :

Polarity of bond decided on the basis of electronegativity difference between the 2 atoms forming that bond.

Larger the electronegativity difference more polar is the bond.

The bond with electronegativity difference 0 is Non-Polar.

Let us calculate Electronegativity difference between each pair of atoms.

a) E(N) = 3.0, E(Cl) = 3.0

Electronegativity difference is 0.

b) E(Br) = 3.0

Homodiatomic molecules like Br2 i.e Br-Br bond are non polar .

c) E(P) = 2.1 E(O) = 3.5

Electronegativity difference = E(O) - E(P) = 3.5 - 2.1 = 1.4

d) E(H) = 2.1 E(Te) = 2.1

Electronegativity difference = E(O) - E(P) = 0

From these electronegativity calculations it's clear that Electronegativity difference is largest 1.4 for P-O bond

and P-O bond is only polar.

======================XXXXXXXXXXXXXXXXXXX====================