Electroanalytical Techniques: Conductometry, Potentiometry, and Voltammetry MCQs
Electroanalytical Techniques – Conductometry, Potentiometry, and Voltammetry MCQs
Electroanalytical techniques like Conductometry, Potentiometry, and Voltammetry are essential methods in analytical chemistry for measuring ionic conductivity, electrode potentials, and current responses. These techniques help in chemical analysis, solution characterization, and concentration determination of analytes. Learn how they work and their applications in modern electrochemistry.
Conductometry
Conductometry measures: (a) Electrical resistance (b) Electrical conductivity of a solution (c) Light absorption (d) Thermal conductivity Answer: (b) Electrical conductivity of a solution
The SI unit of conductivity is: (a) Ohm (Ω) (b) Siemens per meter (S/m) (c) Farad (F) (d) Volt (V) Answer: (b) Siemens per meter (S/m)
Which type of reaction is commonly analyzed using conductometry? (a) Redox reactions (b) Precipitation reactions (c) Acid-base neutralization reactions (d) Complexometric reactions Answer: (c) Acid-base neutralization reactions
Which factor affects the conductivity of a solution? (a) Temperature (b) Ion concentration (c) Type of electrolyte (d) All of the above Answer: (d) All of the above
Which instrument is used to measure conductivity? (a) Conductometer (b) Spectrophotometer (c) Potentiometer (d) pH meter Answer: (a) Conductometer
Potentiometry
Potentiometry measures: (a) Conductance (b) Electromotive force (EMF) of an electrochemical cell (c) Heat transfer (d) Light absorbance Answer: (b) Electromotive force (EMF) of an electrochemical cell
Which of the following is used as a reference electrode in potentiometry? (a) Hydrogen electrode (b) Silver-silver chloride electrode (c) Calomel electrode (d) All of the above Answer: (d) All of the above
Potentiometry is commonly used to determine: (a) pH of a solution (b) Molecular weight of a compound (c) Conductivity (d) Refractive index Answer: (a) pH of a solution
The working principle of a potentiometer is based on: (a) Ohm’s law (b) Nernst equation (c) Beer-Lambert law (d) Hess’s law Answer: (b) Nernst equation
Voltammetry
Voltammetry measures: (a) Absorbance of light (b) Electrical current as a function of applied potential (c) Heat change in a reaction (d) Conductivity of a solution Answer: (b) Electrical current as a function of applied potential
Which electrode is commonly used as the working electrode in voltammetry? (a) Silver-silver chloride electrode (b) Platinum electrode (c) Mercury drop electrode (d) All of the above Answer: (d) All of the above
Which type of voltammetry uses a dropping mercury electrode? (a) Cyclic voltammetry (b) Differential pulse voltammetry (c) Polarography (d) Amperometry Answer: (c) Polarography
The peak current in voltammetry is proportional to: (a) Temperature of the solution (b) Concentration of the analyte (c) Pressure of the gas (d) Ionic strength of the solution Answer: (b) Concentration of the analyte