The Intro to Spectroscopy (UV–Vis, IR) – Applications section highlights the practical and real-world uses of spectroscopic techniques in chemical analysis, research, industry, and quality control. This module is designed for Class 11–12 students and undergraduate learners, helping them connect spectroscopic theory with real-life chemical applications.
In this section, you will explore:
Applications of UV–Visible spectroscopy – concentration determination, reaction kinetics monitoring, and colorimetric analysis
Qualitative identification of compounds using characteristic UV–Vis absorption bands
Infrared (IR) spectroscopy applications – functional group identification and structural confirmation
Organic compound analysis – detection of alcohols, acids, carbonyls, and aromatic compounds
Industrial and pharmaceutical uses – purity testing, drug analysis, and quality assurance
Environmental applications – pollutant detection and water analysis
Biochemical and biological relevance – analysis of proteins, nucleic acids, and biomolecules (introductory)
Forensic and material analysis – identification of unknown samples and polymers
NCERT- and UG-aligned explanations, supported by real spectra examples, case-based questions, MCQs, and application-oriented numericals
The content is structured to enhance application-based reasoning, develop interpretation skills, and prepare students for practical exams, viva questions, and case-based assessments.
Develop a practical understanding of UV–Vis and IR spectroscopy by exploring their applications across science and industry, strengthening both academic performance and analytical insight.
Q. In UV-Vis spectroscopy, what does the Beer-Lambert law relate?
A.
Wavelength and energy
B.
Absorbance and concentration
C.
Frequency and intensity
D.
Temperature and pressure
Solution
The Beer-Lambert law relates absorbance to concentration, indicating that absorbance increases linearly with concentration of the absorbing species.
Q. What is the main advantage of using FTIR over traditional IR spectroscopy?
A.
Higher resolution
B.
Faster data acquisition
C.
Lower cost
D.
Simpler sample preparation
Solution
FTIR (Fourier Transform Infrared) spectroscopy offers higher resolution and faster data acquisition compared to traditional dispersive IR spectroscopy.
Q. What type of information can be obtained from a UV-Vis spectrum?
A.
Molecular structure
B.
Concentration of ions
C.
Presence of functional groups
D.
All of the above
Solution
A UV-Vis spectrum can provide information about molecular structure, concentration of absorbing species, and presence of functional groups based on absorbance patterns.
