* Molecular Structure: Sucrose is a disaccharide composed of glucose and fructose. Both of these sugars contain multiple hydroxyl (-OH) groups.

* Polar Bonds: The oxygen atom in the hydroxyl groups is more electronegative than the hydrogen atom. This creates a polar covalent bond, meaning the shared electrons spend more time around the oxygen, giving it a partial negative charge and the hydrogen a partial positive charge.

* Molecular Shape: The arrangement of these polar hydroxyl groups in sucrose creates an overall dipole moment, making the molecule polar.

Covalent vs. Polar:

* Covalent bonds involve the sharing of electrons between atoms.

* Polar covalent bonds are a specific type of covalent bond where the electrons are shared unequally, creating partial charges on the atoms.

Therefore, sucrose is a polar molecule due to its polar covalent bonds and overall dipole moment.