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Questions and Answers
What is the property of disinfectant solutions that allows them to spread out on the cell wall of bacteria and disrupt them?
What is the property of disinfectant solutions that allows them to spread out on the cell wall of bacteria and disrupt them?
- High surface tension
- Strong intermolecular cohesive forces
- Low surface tension (correct)
- Ability to form hydrogen bonds
What is the typical surface tension of normal urine, and how does it change if bile is present?
What is the typical surface tension of normal urine, and how does it change if bile is present?
- ~66 dynes/cm, decreases with bile presence
- ~55 dynes/cm, decreases with bile presence (correct)
- ~55 dynes/cm, increases with bile presence
- ~66 dynes/cm, increases with bile presence
What is responsible for the property of surface tension in liquids?
What is responsible for the property of surface tension in liquids?
- Random motion of molecules
- Presence of hydrogen bonds
- Intermolecular repulsion forces
- Intermolecular cohesive forces (correct)
In which state do molecules tend to pack together so that their average separation is minimum?
In which state do molecules tend to pack together so that their average separation is minimum?
Why do free droplets of liquid naturally assume a spherical shape?
Why do free droplets of liquid naturally assume a spherical shape?
What happens to the liquid surface when there are equal cohesive forces among the molecules inside the liquid?
What happens to the liquid surface when there are equal cohesive forces among the molecules inside the liquid?
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?
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?
What is the unit of surface tension according to the provided text?
What is the unit of surface tension according to the provided text?
What happens to the surface tension of a liquid when a solute that is less soluble in the liquid is added?
What happens to the surface tension of a liquid when a solute that is less soluble in the liquid is added?
What term is used when referring to energy per unit area related to surface tension?
What term is used when referring to energy per unit area related to surface tension?
What type of molecules possess both lyophobic (solvent hating) and lyophilic (solvent liking) regions?
What type of molecules possess both lyophobic (solvent hating) and lyophilic (solvent liking) regions?
What chemical groups lead to surface activity according to the provided text?
What chemical groups lead to surface activity according to the provided text?
Which type of moiety can be different in length, hydrophobicity, and stiffness in surfactant molecules?
Which type of moiety can be different in length, hydrophobicity, and stiffness in surfactant molecules?
What must possess a minimum ratio between hydrophilic and hydrophobic part?
What must possess a minimum ratio between hydrophilic and hydrophobic part?
Which type of surfactant molecules can be neutral, anionic, cationic, or zwitterionic?
Which type of surfactant molecules can be neutral, anionic, cationic, or zwitterionic?
What does the abbreviation C in C-shaped wire frame stand for?
What does the abbreviation C in C-shaped wire frame stand for?
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