Based strictly on the differences in Pauling electronegativity values, which of the following pairs — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Bond polarity is directly proportional to the electronegativity difference ($\Delta EN$). Approximate Pauling values: F(4.0), O(3.5), N(3.0), Cl(3.0), C(2.5), S(2.5), I(2.5), P(2.1). Differences: $C-I$ ($2.5-2.5=0$), $N-O$ ($3.5-3.0=0.5$), $C-F$ ($4.0-2.5=1.5$), $P-F$ ($4.0-2.1=1.9$). $C-I$ is the least polar (almost non-polar) and $P-F$ is the most polar.