Which will cause an increase in the reaction rate between molecules?
molecules have strong internal bonding.
molecules collide more frequently
electrons in the bonds remain in a meta-stable state.
electrons do not have enough energy to leave the bonds.

a corroding iron, if that's one of your choices

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

the answer is c i took the test