FREE Analytical Chemistry Questions and Answers
What is the principle of UV-Vis spectroscopy?
UV-Vis spectroscopy measures the absorption of ultraviolet or visible light by a substance, which corresponds to electronic transitions in the molecule.
Which technique separates compounds based on their boiling points?
Gas chromatography separates compounds based on their boiling points and interactions with the stationary and mobile phases.
What is the purpose of a reference electrode in potentiometry?
The reference electrode in potentiometry provides a stable and known potential against which the working electrode is measured.
Which of the following is a primary standard in titration?
Sodium carbonate (Na2CO3) is a primary standard because it is stable, pure, and has a known molar mass.
What is the principle of gravimetric analysis?
Gravimetric analysis involves the precipitation of a compound, filtering, drying, and weighing it to determine the amount of analyte.
Which chromatography technique uses a liquid mobile phase?
Liquid chromatography uses a liquid mobile phase to separate analytes based on their interactions with the stationary phase.