Question

consider the following electronegativity values:
boron (b) = 1.8
carbon (c) = 2.5
chlorine (cl) = 3.2
selenium (se) = 2.6
which of the following bonds is the most polar?
multiple choice
se - cl
c - cl
it cannot be determined from the information provided.
b - cl

Explanation:

Step1: Calculate Se-Cl electronegativity difference

$\Delta EN = |3.2 - 2.6| = 0.6$

Step2: Calculate C-Cl electronegativity difference

$\Delta EN = |3.2 - 2.5| = 0.7$

Step3: Calculate B-Cl electronegativity difference

$\Delta EN = |3.2 - 1.8| = 1.4$

Step4: Compare all differences

The largest $\Delta EN$ indicates the most polar bond.

Answer:

B-Cl