0% Potentiometry and Surface Chemistry Quiz 1 / 29In the Nernst equation, the term "n" represents: a) Gas constant b) Valency of ions c) Faraday's constant d) Temperature 2 / 29The Henderson equation is used to calculate: a) pKa of a weak acid b) Electrode potential c) Salt bridge conductivity d) Ion selectivity 3 / 29Which electrode is NOT used in potentiometry? a) Glass electrode b) Saturated Calomel Electrode c) Platinum electrode d) Spectrophotometer 4 / 29The purpose of a porous frit in a salt bridge is to: a) Increase resistance b) Allow ion migration c) Block electron flow d) Filter impurities 5 / 29The reference electrode in a pH meter is typically: a) Glass electrode b) Saturated Calomel Electrode c) Fluoride electrode d) Platinum electrode 6 / 29Which of the following is NOT an application of potentiometry? a) Measuring blood glucose b) Determining soil nitrate c) Analyzing water fluoride d) Measuring atmospheric pressure 7 / 29The term "ISE" stands for: a) Ion-Sensitive Element b) Ion-Selective Electrode c) Inert Salt Electrode d) Indicator Standard Electrode 8 / 29Which of the following is a characteristic of a good salt bridge electrolyte? a) High reactivity b) Inertness c) Low solubility d) Colored 9 / 29The primary use of potentiometry in clinical chemistry is to measure: a) Blood pressure b) Electrolytes (Na⁺, K⁺, Cl⁻) c) Cholesterol levels d) Hemoglobin content 10 / 29The electrode potential of a Standard Hydrogen Electrode (SHE) is: a) +0.2422 V b) 0 V c) -0.762 V d) +1.0 V 11 / 29Which of the following is NOT a reference electrode? a) Standard Hydrogen Electrode (SHE) b) Glass electrode c) Silver-Silver Chloride electrode d) Saturated Calomel Electrode 12 / 29The potential difference in potentiometry arises due to: a) Mixing of two solutions b) Redox reactions at electrodes c) Temperature changes d) Pressure changes 13 / 29Potentiometry is used to determine: a) Color of the solution b) Unknown concentration of solute c) Density of the solution d) Viscosity of the solution 14 / 29What is the primary condition under which potential is measured in potentiometry? a) High current flow b) No current flow c) Alternating current flow d) Constant current flow 15 / 29The term "physisorption" refers to adsorption due to: a) Chemical bonds b) van der Waals forces c) Hydrogen bonds d) Ionic bonds 16 / 29The hydrophilic part of a soap molecule is: a) Hydrocarbon tail b) Charged head c) Both a and b d) None of the above 17 / 29Micelles are formed when surfactant concentration exceeds: a) Kraft temperature b) Critical micelle concentration (CMC) c) Cloud point d) None of the above 18 / 29Electrophoresis is used to determine: a) Charge on colloidal particles b) Size of colloidal particles c) Temperature of colloids d) None of the above 19 / 29The process of converting a precipitate into colloidal particles is called: a) Dialysis b) Peptization c) Electrophoresis d) Coagulation 20 / 29Brownian motion refers to the: a) Random movement of colloidal particles b) Sedimentation of particles c) Coagulation of colloids d) None of the above 21 / 29The Tyndall effect is observed in: a) True solutions b) Colloidal solutions c) Suspensions d) Both b) and c) 22 / 29Chemisorption is usually: a) Reversible b) Non-specific c) Irreversible d) Multilayered 23 / 29The enthalpy of adsorption for physisorption typically ranges between: a) 20–40 kJ/mol b) 200–400 kJ/mol c) 500–600 kJ/mol d) 1–10 kJ/mol 24 / 29Which of the following is NOT a cause of adsorption? a) Hydrophobicity b) Electrostatic forces c) Chemical bonding d) High pressure alone 25 / 29Chemical adsorption involves: a) Weak van der Waals forces b) Formation of multilayers c) Strong chemical bonding and specificity d) No activation energy 26 / 29Physical adsorption is characterized by: a) Strong chemical bonds b) Van der Waals forces and reversibility c) Formation of monolayers d) High specificity 27 / 29Absorption differs from adsorption in that absorption involves: a) Molecules sticking to a surface b) Molecules entering the bulk phase of a material c) Only chemical bonding d) Only physical bonding 28 / 29Adsorption is best described as: a) The absorption of light by a surface b) The adhesion of atoms, ions, or molecules to a surface c) The dissolution of a solid in a liquid d) The mixing of two gases 29 / 29What is surface chemistry primarily concerned with? a) Reactions in bulk phases b) Processes at the interface of two bulk phases c) Only solid-gas interactions d) Only liquid-liquid interactions Your score isThe average score is 68% LinkedIn Facebook VKontakte 0% Restart quiz Send feedback
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