1) The measurement of surface or interfacial tension is commonly expressed in which unit? a) Newton per meter (N/m) b) Pascal (Pa) c) Joule (J) d) Kelvin (K) 2) What is the term for the phenomenon of molecules or ions accumulating at the surface or interface of a liquid? a) Surface tension b) Interfacial tension c) Spreading coefficient d) Adsorption 3) Which scale is commonly used to express the hydrophilic-lipophilic balance of surfactants? a) pH scale b) Richter scale c) HLB scale d) Kelvin scale 4) Which of the following is a measure of the ability of a surfactant to solubilize a water-insoluble substance? a) Spreading coefficient b) HLB scale c) Solubilization d) Adsorption 5) Which type of substances reduces the surface tension of a liquid and is commonly used in detergents? a) Surface tension enhancers b) Surface active agents c) Surface stabilizers d) Surface inhibitors 6) What is the term for the ability of a surfactant to remove dirt or oil from a surface? a) Desorption b) Adsorption c) Solubilization d) Detergency 7) Which factor is crucial in determining the stability of emulsions? a) Surface tension b) Interfacial tension c) Spreading coefficient d) Adsorption 8) What is the Kraft point in the context of surfactants? a) The temperature at which a surfactant reaches maximum solubility in a solvent b) The temperature at which micelles break down c) The temperature at which a surfactant becomes insoluble in water d) The temperature at which micelles start to form in a solution 9) What type of surfactant has both hydrophilic and lipophilic portions in its molecular structure? a) Anionic surfactant b) Cationic surfactant c) Nonionic surfactant d) Zwitterionic surfactant 10) Which type of surfactant is commonly used in hair conditioners? a) Anionic surfactant b) Cationic surfactant c) Nonionic surfactant d) Zwitterionic surfactant

Quiz 3 (Unit 3)

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?