AP BIOLOGY

Detailed explanation-1: -The entire molecule of hydrogen sulphide is nonpolar because it is made up entirely of non-polar $ H-S $ bonds. Despite its asymmetrical molecular shape, the molecule as a whole is non-polar due to the lack of polar links. Note : The different types of covalent bonding are mostly determined by electronegativity.

Detailed explanation-2: -Carbon disulphide has a linear structure in which two bond dipoles are in opposite directions resulting in cancelling out the dipole moments. So carbon disulphide is non-polar.

Detailed explanation-3: -The sulfur hexafluoride molecule is nonpolar and contains no lone (unshared) electron pairs on the sulfur atom.

Detailed explanation-4: -Symmetrical molecules are nonpolar. Because nonpolar molecules share their charges evenly, they do not react to electrostatic charges like water does. Covalent molecules made of only one type of atom, like hydrogen gas (H2), are nonpolar because the hydrogen atoms share their electrons equally.