Which of the bonds in the following molecule are polar covalent?
A) C-H and O-H only
B) C-O and O-H only
C) C-O only
D) C-C and C-O
E) O-H only

Question

Which of the bonds in the following molecule are polar covalent? 
A) C-H and O-H only 
B) C-O and O-H only 
C) C-O only 
D) C-C and C-O 
E) O-H only

Quizplus · Accepted Answer

In a polar covalent bond, the electrons are shared unequally between the atoms. Oxygen is more electronegative than carbon and hydrogen, so it pulls the shared electrons closer to itself, creating a partial negative charge on oxygen and a partial positive charge on carbon and hydrogen. Therefore, the bonds between carbon and oxygen (C-O) and between oxygen and hydrogen (O-H) in the molecule are polar covalent, and the answer is B.

Which of the Bonds in the Following Molecule Are Polar