16 Questions
What property of disinfectant solutions allows them to spread out on the cell wall of bacteria?
Low surface tension
In the clinical test for jaundice, what is the surface tension of urine with bile present?
55 dynes/cm
What is responsible for lowering the surface tension in washing detergent?
Intermolecular cohesive forces
What type of motion do molecules exhibit in gases?
Random motion
What shape does a free droplet of liquid naturally assume?
Spherical shape
What do molecules on the surface of a liquid have on one side that molecules inside the liquid do not?
Neighboring molecules only on one side
What is the relationship between force and the length of the movable side?
Force is directly proportional to the length
What does the surface tension of a liquid represent?
The force required to create a new surface area
What are surfactant molecules capable of doing when dissolved in a liquid?
Reducing surface tension
How does the solubility of a solute in a liquid affect the surface tension of the liquid?
Decreases if solute is less soluble, increases if very soluble
What is the term used for materials possessing chemical groups leading to surface activity when dissolved in a liquid?
Surface active agents
What is the relationship between force and the length when considering surface tension?
Force is directly related to the length
What defines surfactant molecules?
They possess chemical groups leading to surface activity when dissolved in a liquid
What is the dimension of surface tension?
Force per unit length
What happens to the surface tension of a liquid if a solute is less soluble in it?
It decreases
What is the term used for molecules having both lyophobic and lyophilic regions?
Amphiphiles
Test your knowledge about surface tension and its effects on disinfectants, clinical tests, and other substances. Explore the concepts of intermolecular forces and membrane behavior in liquids.
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