A compound with a polar covalent bond has a permanent dipole. This is because the more electronegative atom in the bond pulls electron density towards itself, leaving the other atom with a slight deficit in electron density. This results in the electronegative atom having a partial positive charge, and the less electronegative atom bearing a partial negative charge. Water, H2O, has two polar covalent bonds. Thus, it bears partial positives on the hydrogens and a partial negative on the oxygen. When water encounters another molecule with a partial charge, it is attracted to those partial charges in the same way a magnet would be - positive seeks negative, negative seeks positive. This attraction allows polar compounds to dissolve in water. Oils are nonpolar substances and will not interact with partially charged compounds. Thus, a polar compound is more likely to be attracted to itself than to the oil solvent, and the compound will not dissolve. A is correct. Solution A compound with a polar covalent bond has a permanent dipole. This is because the more electronegative atom in the bond pulls electron density towards itself, leaving the other atom with a slight deficit in electron density. This results in the electronegative atom having a partial positive charge, and the less electronegative atom bearing a partial negative charge. Water, H2O, has two polar covalent bonds. Thus, it bears partial positives on the hydrogens and a partial negative on the oxygen. When water encounters another molecule with a partial charge, it is attracted to those partial charges in the same way a magnet would be - positive seeks negative, negative seeks positive. This attraction allows polar compounds to dissolve in water. Oils are nonpolar substances and will not interact with partially charged compounds. Thus, a polar compound is more likely to be attracted to itself than to the oil solvent, and the compound will not dissolve. A is correct..

1. A compound with a polar covalent bond has a permanent dipole. This is because the
more electronegative atom in the bond pulls electron density towards itself, leaving the other
atom with a slight deficit in electron density. This results in the electronegative atom having a
partial positive charge, and the less electronegative atom bearing a partial negative charge.
Water, H2O, has two polar covalent bonds. Thus, it bears partial positives on the hydrogens and
a partial negative on the oxygen. When water encounters another molecule with a partial charge,
it is attracted to those partial charges in the same way a magnet would be - positive seeks
negative, negative seeks positive. This attraction allows polar compounds to dissolve in water.
Oils are nonpolar substances and will not interact with partially charged compounds. Thus, a
polar compound is more likely to be attracted to itself than to the oil solvent, and the compound
will not dissolve. A is correct.
Solution
A compound with a polar covalent bond has a permanent dipole. This is because the
more electronegative atom in the bond pulls electron density towards itself, leaving the other
atom with a slight deficit in electron density. This results in the electronegative atom having a
partial positive charge, and the less electronegative atom bearing a partial negative charge.
Water, H2O, has two polar covalent bonds. Thus, it bears partial positives on the hydrogens and
a partial negative on the oxygen. When water encounters another molecule with a partial charge,
it is attracted to those partial charges in the same way a magnet would be - positive seeks
negative, negative seeks positive. This attraction allows polar compounds to dissolve in water.
Oils are nonpolar substances and will not interact with partially charged compounds. Thus, a
polar compound is more likely to be attracted to itself than to the oil solvent, and the compound
will not dissolve. A is correct.