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Questions and Answers
What is the main difference between an interface and a surface?
What is the main difference between an interface and a surface?
- An interface is only between two immiscible phases, while a surface is between a liquid and air. (correct)
- An interface is only between two liquid phases, while a surface is between a liquid and a gas.
- An interface is between two liquids, while a surface is between a solid and a liquid.
- An interface is between a solid and a liquid, while a surface is between a liquid and a gas.
What happens to the spreading coefficient on water as the carbon chain of an acid increases?
What happens to the spreading coefficient on water as the carbon chain of an acid increases?
- It becomes zero
- It increases
- It remains the same
- It decreases (correct)
Why does benzene spread on water?
Why does benzene spread on water?
- Because it is a nonpolar substance
- Because it is a polar substance
- Because the cohesive forces between its molecules are weaker than the adhesion for water (correct)
- Because it is heavier than water
What is the unit of surface tension?
What is the unit of surface tension?
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Why does liquid petrolatum not spread on water?
Why does liquid petrolatum not spread on water?
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