Dip a Paper Clip into Water and Then Slowly Pull

question 101

Multiple Choice

Dip a paper clip into water and then slowly pull it out. You'll find that for a short distance, the water is brought up with the metal. Are these adhesive or cohesive forces at work?

• A)These are the adhesive forces between the water and the metal (two different materials). The type of molecular interactions going on are dipole-induced dipole.
• B)These are the adhesive forces between the water molecules. The type of molecular interactions going on are dipole-induced dipole.
• C)These are the adhesive forces between the water and the metal (two different materials). The type of molecular interactions going on are dipole-dipole.
• D)These are the cohesive forces between the water molecules. Water has such a strong attraction for itself that it will cling to the water on the paper clip until the force of gravity is stronger than its cohesive forces.

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