Answer:
E. Cl – Cl
Explanation:
First let's look at the electronegativity values of each of these elements:
P - 2.1
Cl - 3.0
O - 3.5
H - 2.1
S - 1.8
If the electronegativity difference is between 0.4 and 1.9, it's a polar covalent bond. So whichever one isn't between .4 and 1.9, is the answer.
The differences can't be negative.
A. P – Cl (3.0 – 2.1) = 0.9 ❌
B. O – H (3.5 – 2.1) = 1.4 ❌
C. S – Cl (3.0 – 1.8) = 1.2 ❌
D. H – Cl (3.0 – 2.1) = 1.2 ❌
E. Cl – Cl (3.0 – 3.0) = 0 ✔
