Which of the following descriptions of gravitational force is NOT TRUE?

A. It depends on the mass of objects.
B. It is a repulsive force.
C. It depends on the distance between objects.
D. It exists between all objects

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.