Question

Which of the following covalent bonds is the most polar?

A) C - C
B) C - H
C) C - Cl
D) C - S
E) C - Br

Answer 1

Answer:

C) C-Cl

Explanation:

We have to consider the electronegativity difference between each atom. If the electronegativity difference is high, then its polar nature is more.

Approximate electronegativity values according to the Pauling scale are as follows.

C- 2.5

H- 2.1

Cl- 3.0

S- 2.5

Br- 2.8

Now we can find out the electronegativity difference. A- 0

B- 0.4

C- 0.5

D- 0

E- 0.3

The largest electronegativity difference is found in C-Cl bond. So it is the most polar.