The Analytical Techniques section focuses on the methods and instruments used for qualitative and quantitative chemical analysis, essential for understanding experimental chemistry, material characterization, and laboratory diagnostics. This module is designed for school (Class 11–12) and undergraduate students, with strong emphasis on conceptual clarity, instrumentation basics, and exam relevance.
In this section, you will study:
Classical analytical methods – qualitative analysis, gravimetric and volumetric analysis
Spectroscopic techniques – UV–Visible spectroscopy, IR spectroscopy, NMR (introductory level), and mass spectrometry
Chromatographic methods – paper chromatography, TLC, column chromatography, gas chromatography, and HPLC (basics)
Electroanalytical techniques – conductometry, potentiometry, pH measurement, and electrochemical cells
Thermal and surface analysis (introductory) – TGA, DTA, and DSC (UG level)
Instrumentation principles – working, components, and applications
Data interpretation – spectra analysis, peak identification, and quantitative calculations
NCERT- and UG-aligned explanations, supported by diagrams, numericals, MCQs, assertion–reason questions, and PYQs
The content is structured to bridge theory with laboratory practice, strengthen analytical and interpretation skills, and help students confidently answer instrumentation- and application-based questions in school and undergraduate examinations.
Develop a systematic and practical understanding of Analytical Techniques to master this crucial area of modern Chemistry.
Q. What is the significance of the dilution factor in titration?
A.
It affects the endpoint
B.
It determines the concentration of the titrant
C.
It helps calculate the concentration of the analyte
D.
It has no significance
Solution
The dilution factor is significant as it helps in calculating the concentration of the analyte based on the volume and concentration of the titrant used.
Correct Answer:
C
— It helps calculate the concentration of the analyte
Q. What is the significance of the equivalence point in a titration?
A.
It is the point where the indicator changes color
B.
It is the point where the amount of titrant equals the amount of analyte
C.
It is the point where the solution is neutral
D.
It is the point where the reaction starts
Solution
The equivalence point is significant because it indicates that the amount of titrant added is stoichiometrically equivalent to the amount of analyte present.
Correct Answer:
B
— It is the point where the amount of titrant equals the amount of analyte
Q. What is the significance of the equivalence point in titration?
A.
It is when the titrant is first added
B.
It is when the amount of titrant equals the amount of analyte
C.
It is when the solution is neutral
D.
It is when the indicator changes color
Solution
The equivalence point is significant because it is the stage in the titration where the amount of titrant added is stoichiometrically equivalent to the amount of analyte present.
Correct Answer:
B
— It is when the amount of titrant equals the amount of analyte
Q. What is the significance of the peak position in an IR spectrum?
A.
It indicates the concentration of the sample
B.
It reveals the molecular weight of the compound
C.
It provides information about the types of bonds present
D.
It determines the solubility of the compound
Solution
The peak position in an IR spectrum provides information about the types of bonds present in the molecule, as different bonds absorb at characteristic frequencies.
Correct Answer:
C
— It provides information about the types of bonds present
Q. What is the significance of using a standard curve in quantitative ion analysis?
A.
To determine the pH of the solution
B.
To identify unknown compounds
C.
To quantify the concentration of ions in a sample
D.
To measure the temperature of the reaction
Solution
A standard curve is essential in quantitative ion analysis as it allows for the determination of the concentration of ions in an unknown sample based on known standards.
Correct Answer:
C
— To quantify the concentration of ions in a sample
Q. What type of bond is primarily detected in the fingerprint region of an IR spectrum?
A.
C-H bonds
B.
O-H bonds
C.
C-C bonds
D.
Complex vibrations of multiple bonds
Solution
The fingerprint region of an IR spectrum (typically 400-1500 cm-1) is characterized by complex vibrations of multiple bonds, making it unique for different compounds.
Correct Answer:
D
— Complex vibrations of multiple bonds
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.
Q. Which analytical technique is best suited for determining the concentration of a colored solution?
A.
NMR spectroscopy
B.
UV-Vis spectroscopy
C.
Gas chromatography
D.
Titration
Solution
UV-Vis spectroscopy is best suited for determining the concentration of a colored solution by measuring the absorbance of light at specific wavelengths.