. Which of the following chemical bond is present
between H and Cl in HCl ?
A: Ionic bond
B: co - ordinate covalent bond
C: Non - Covalent bond
D: Polar covalent bond
The correct answer is option D i.e a polar covalent bond is present between H and Cl in HCl.
This is because the electronegativity(EN) value(on Pauling scale) of H is 2.1 while that of Cl is
3.0 , so the EN difference between the two is 0.8 and bonds with EN difference in the range of
0.5 to 1.7 are polar covalent while those below are non-polar covalent and the ones above are ionic bonds.
Thus, HCl with a EN difference of ~0.8 (on Pauling scale) has a polar covalent bond, so the correct answer is option D.