16 Questions
What is the property of disinfectant solutions that allows them to spread out on the cell wall of bacteria and disrupt them?
Low surface tension
What is the typical surface tension of normal urine, and how does it change if bile is present?
~55 dynes/cm, decreases with bile presence
What is responsible for the property of surface tension in liquids?
Intermolecular cohesive forces
In which state do molecules tend to pack together so that their average separation is minimum?
Solid
Why do free droplets of liquid naturally assume a spherical shape?
To minimize volume
What happens to the liquid surface when there are equal cohesive forces among the molecules inside the liquid?
The liquid surface contracts inward
What is the relationship between surface tension and the force required to keep a movable side of a frame over which the liquid is stretched?
Surface tension is directly proportional to the force required
What is the unit of surface tension according to the provided text?
Newton per meter (N/m)
What happens to the surface tension of a liquid when a solute that is less soluble in the liquid is added?
The surface tension decreases
What term is used when referring to energy per unit area related to surface tension?
Surface energy
What type of molecules possess both lyophobic (solvent hating) and lyophilic (solvent liking) regions?
Surfactant molecules
What chemical groups lead to surface activity according to the provided text?
Amphiphilic groups
Which type of moiety can be different in length, hydrophobicity, and stiffness in surfactant molecules?
'Tail' moiety
What must possess a minimum ratio between hydrophilic and hydrophobic part?
'Amphiphilic' molecules
Which type of surfactant molecules can be neutral, anionic, cationic, or zwitterionic?
'Amphiphilic' molecules
What does the abbreviation C in C-shaped wire frame stand for?
'Circular'
Test your knowledge of surface tension with this quiz covering topics such as disinfectant solutions, clinical tests for jaundice, and the intermolecular cohesive forces responsible for surface tension. Explore the properties of liquids and their behavior at the molecular level.
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