Question

which of the following bonds is most polar?
a f-f
b o-f
c o-i
d o-cl

Explanation:

Step1: Recall electronegativity values

Electronegativity values: \( \text{O} = 3.44\), \( \text{F} = 3.98\), \( \text{Cl} = 3.16\), \( \text{I} = 2.66\).

Step2: Calculate electronegativity differences

• For \( \text{F - F}\): \( \Delta \text{EN}=3.98 - 3.98=0\) (non - polar).
• For \( \text{O - F}\): \( \Delta \text{EN}=3.98 - 3.44 = 0.54\).
• For \( \text{O - I}\): \( \Delta \text{EN}=3.44 - 2.66=0.78\).
• For \( \text{O - Cl}\): \( \Delta \text{EN}=3.44 - 3.16 = 0.28\).

Answer:

C. O - I