MCQs Quiz

Introduction The rotating platinum electrode is a key tool in electrochemistry and pharmaceutical analysis. This introduction explains the construction and working of a rotating platinum electrode (RDE/RPE), highlighting components such as the platinum disk, shaft, insulating sleeve, motor, and electrode housing. It covers hydrodynamic voltammetry, mass transport control, diffusion layer behavior, and the Levich and … Read more

Understanding the construction and working of the dropping mercury electrode (DME) is essential for B. Pharm students studying electrochemical analysis and polarography. The DME comprises a mercury reservoir, a fine glass capillary, an electrical contact, and a drop-collection arrangement, providing a renewable mercury surface with controlled drop time and size. Key topics include capillary geometry, … Read more

Understanding the Ilkovic equation and diffusion current is essential for B.Pharm students studying analytical electrochemistry and polarography. The Ilkovic equation links diffusion current at a dropping mercury electrode to analyte concentration, diffusion coefficient, mercury flow rate and drop time, enabling quantitative analysis of reducible or oxidizable drugs. The typical Ilkovic expression shows Id proportional to … Read more

Principle of polarography MCQs With Answer Polarography is an electroanalytical method vital in pharmaceutical analysis that measures current as a function of applied potential at a dropping mercury electrode. The principle of polarography is based on diffusion-controlled reduction or oxidation at a renewable mercury surface, producing characteristic polarographic waves described by the Ilkovic equation, diffusion … Read more

Potentiometry is a versatile electroanalytical technique widely used in pharmaceutical analysis for pH measurement, ion quantification and potentiometric titrations. B. Pharm students must master principles such as the Nernst equation, ion-selective electrodes (ISEs), reference electrodes, calibration, ionic strength adjustment and troubleshooting. Practical applications include assay of ionic drugs, dissolution testing, stability studies, impurity monitoring and … Read more

Introduction Potentiometric titration is a precise analytical method used in pharmaceutical analysis to determine the end point by measuring electrical potential changes. Key concepts include potentiometric titration curves, indicator and reference electrodes, Nernst equation behavior, and methods such as inflection-point detection, first and second derivative plots, Gran plots, and midpoint or half-neutralization approaches. B. Pharm … Read more

Indicator electrodes – metal and glass electrodes MCQs With Answer This concise introduction covers indicator electrodes—metal and glass electrodes—tailored for B. Pharm students. You will learn core concepts such as potentiometry, ion-selective electrodes, the Nernst equation, pH electrode construction and response, reference electrodes (Ag/AgCl, SCE), liquid junction potentials, selectivity coefficients (Nikolskii–Eisenman), alkaline/acid errors, calibration, conditioning … Read more

Reference electrodes are essential components in electrochemical measurements, providing a stable, well-defined potential against which working electrodes are measured. For B.Pharm students, understanding the Standard Hydrogen Electrode (SHE), Silver/Silver Chloride (Ag/AgCl) electrode, and Saturated Calomel Electrode (SCE) is vital for potentiometry, pH measurement, and sensor calibration. This introduction covers construction, electrode reactions, advantages, limitations, salt … Read more

Electrochemical cell and electrode potentials are core topics for B. Pharm students studying redox chemistry, thermodynamics, and analytical techniques. This introduction covers galvanic and electrolytic cells, standard electrode potential (E°), electrode notation, the Nernst equation, and the ΔG = −nFE relationship. You will learn how concentration, temperature, and electron transfer number affect cell emf, and … Read more

Principles of potentiometry MCQs With Answer Introduction: Potentiometry is a core electroanalytical technique in pharmaceutical analysis, focusing on measuring electrical potential differences between electrodes to determine ion concentrations. This topic covers electrochemical cells, reference and indicator electrodes, ion-selective electrodes (ISE), the Nernst equation, electrode response, calibration, detection limits, selectivity coefficients, junction potentials, and practical applications … Read more