Final answer:
Polar covalent bonds occur when electrons are shared unequally. SCl₂ is the molecule that contains polar covalent bonds and is polar due to its molecular geometry.
Step-by-step explanation:
In order to determine which of the molecules listed contains polar covalent bonds and is polar, we need to understand the concept of polar bonds and molecular polarity.
A polar bond is a type of covalent bond in which the electrons are shared unequally between two atoms, causing one atom to have a slightly negative charge and the other atom to have a slightly positive charge.
To determine if a molecule is polar, we consider its molecular geometry and the presence of polar bonds. If the polar bonds in a molecule are arranged in such a way that their bond dipole moments cancel each other out, then the molecule is nonpolar. If the bond dipole moments do not cancel each other out, then the molecule is polar.
Out of the molecules listed, the molecule SCl₂ contains polar covalent bonds and is polar. Sulfur has a higher electronegativity than chlorine, causing the electrons to be pulled more towards sulfur and creating a polar bond. Additionally, the molecule has a bent molecular geometry, which prevents the bond dipole moments from canceling each other out, making the molecule polar.