Question

what is a hydrogen bond?
a) the bond that forms a water molecule.
b) when a positive hydrogen atom bonds with a negative atom of another molecule.
c) when two hydrogen atoms stick together.
d) a bond with a license to kill all other bonds.

Explanation:

A hydrogen bond is an intermolecular force where a hydrogen atom (covalently bonded to an electronegative atom like O, N, F) interacts with an electronegative atom of another molecule. Option A is wrong (it's not about forming water molecules). Option C is wrong (H - H is a covalent bond, not H - bond). Option D is a joke. Option B matches the definition.

Answer:

B) When a positive hydrogen atom bonds with a negative atom of another molecule.