Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

In UV-Vis Spectroscopy, what does the term 'molar absorptivity' refer to?

Molar absorptivity is a measure of how well a chemical species absorbs light at a given wavelength per unit concentration.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

Which of the following is NOT a type of ionization technique used in Mass Spectrometry?

Flame Ionization is a detector used in GC, not an ionization technique in Mass Spectrometry.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

What is the main advantage of using High-Performance Liquid Chromatography (HPLC) over traditional column chromatography?

HPLC offers faster analysis times, higher resolution, and better reproducibility compared to traditional column chromatography.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

In electrochemical analysis, what does a 'three-electrode system' typically consist of?

A three-electrode system includes a working electrode, a counter electrode, and a reference electrode to control and measure the potential and current.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

Which detector is commonly used in Gas Chromatography (GC) for detecting organic compounds?

FID is widely used in GC for detecting organic compounds due to its high sensitivity and wide dynamic range.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

What is the principle of Atomic Absorption Spectroscopy (AAS)?

AAS is based on the absorption of light by free, ground-state atoms in the gas phase.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

Which of the following is a primary standard in titration?

Primary standards are highly pure, stable, non-hygroscopic substances with a known concentration, like oxalic acid.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

In chromatography, what does the term 'resolution' refer to?

Resolution in chromatography refers to the ability to separate two closely eluting peaks.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

What is the primary purpose of a buffer solution in analytical chemistry?

Buffer solutions are used to maintain a stable pH in a solution, which is crucial for many chemical reactions and analyses.
Muntaha Nasir CHEMISTRY   -   Analytical Chemistry

Which technique is most suitable for determining the molecular weight of a protein?

Mass spectrometry is used to determine the molecular weight of proteins with high accuracy by measuring the mass-to-charge ratio of ions.

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