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. Which of the following is NOT a typical application of IR spectroscopy?
A.
Identifying organic compounds
B.
Measuring the concentration of solutions
C.
Studying molecular vibrations
D.
Analyzing gas samples
Show solution
Solution
While IR spectroscopy can provide qualitative information about organic compounds, it is not typically used for measuring concentrations of solutions.
Correct Answer:
B
— Measuring the concentration of solutions
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Q. Which of the following ligands is a bidentate ligand?
A.
Ammonia (NH3)
B.
Ethylenediamine (en)
C.
Chloride ion (Cl-)
D.
Water (H2O)
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Solution
Ethylenediamine (en) is a bidentate ligand because it can form two bonds with a metal center.
Correct Answer:
B
— Ethylenediamine (en)
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Q. Which of the following metals is most commonly used in the extraction of aluminum?
A.
Iron
B.
Copper
C.
Bauxite
D.
Zinc
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Solution
Bauxite is the primary ore from which aluminum is extracted.
Correct Answer:
C
— Bauxite
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Q. Which of the following methods can be used to identify cations in a solution?
A.
Thin Layer Chromatography
B.
Electrophoresis
C.
Flame Photometry
D.
All of the above
Show solution
Solution
All of the listed methods can be employed to identify cations in a solution through various analytical techniques.
Correct Answer:
D
— All of the above
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Q. Which of the following methods can be used to monitor the endpoint of a titration?
A.
pH meter
B.
Visual color change
C.
Conductivity measurement
D.
All of the above
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Solution
All of the listed methods—pH meter, visual color change, and conductivity measurement—can be used to monitor the endpoint of a titration.
Correct Answer:
D
— All of the above
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Q. Which of the following methods can be used to perform a titration?
A.
Manual titration with a burette
B.
Automated titration systems
C.
Microscale titration techniques
D.
All of the above
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Solution
All of the listed methods can be used to perform titrations, including manual, automated, and microscale techniques.
Correct Answer:
D
— All of the above
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Q. Which of the following methods can be used to separate proteins based on their charge?
A.
Gas Chromatography
B.
Electrophoresis
C.
Mass Spectrometry
D.
Spectrophotometry
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Solution
Electrophoresis separates proteins based on their charge and size when an electric field is applied.
Correct Answer:
B
— Electrophoresis
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Q. Which of the following methods is best suited for the qualitative analysis of cations in a mixture?
A.
Spectrophotometry
B.
Ion chromatography
C.
Precipitation reactions
D.
Mass spectrometry
Show solution
Solution
Precipitation reactions are commonly used to qualitatively analyze cations by forming insoluble compounds that can be visually identified.
Correct Answer:
C
— Precipitation reactions
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Q. Which of the following methods is primarily used for the qualitative analysis of anions?
A.
Titration
B.
Chromatography
C.
Spectroscopy
D.
Precipitation reactions
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Solution
Precipitation reactions are commonly used to identify anions by forming insoluble salts.
Correct Answer:
D
— Precipitation reactions
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Q. Which of the following statements about IR spectroscopy is true?
A.
It can only analyze gases.
B.
It requires a vacuum for accurate measurements.
C.
It can be used to study solid, liquid, and gas samples.
D.
It is not effective for polar molecules.
Show solution
Solution
IR spectroscopy can analyze solid, liquid, and gas samples, making it versatile for various states of matter.
Correct Answer:
C
— It can be used to study solid, liquid, and gas samples.
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Q. Which of the following statements about the periodic table is true?
A.
Elements in the same group have similar chemical properties.
B.
Elements in the same period have similar atomic masses.
C.
Noble gases are highly reactive.
D.
Metals are located on the right side of the periodic table.
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Solution
Elements in the same group have similar chemical properties due to having the same number of valence electrons.
Correct Answer:
A
— Elements in the same group have similar chemical properties.
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Q. Which of the following statements is true regarding the IR spectrum of a molecule?
A.
It provides information about the molecular weight.
B.
It shows the electronic transitions of the molecule.
C.
It indicates the presence of specific functional groups.
D.
It measures the thermal properties of the substance.
Show solution
Solution
The IR spectrum provides information about the presence of specific functional groups based on their characteristic absorption frequencies.
Correct Answer:
C
— It indicates the presence of specific functional groups.
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Q. Which of the following techniques can be used to confirm the presence of chloride ions?
A.
Barium chloride test
B.
Silver nitrate test
C.
Sodium hydroxide test
D.
Calcium carbonate test
Show solution
Solution
The silver nitrate test is a classic method for confirming the presence of chloride ions, producing a white precipitate of silver chloride.
Correct Answer:
B
— Silver nitrate test
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Q. Which of the following techniques can be used to identify metal cations in a solution?
A.
UV-Vis Spectroscopy
B.
Gas Chromatography
C.
Mass Spectrometry
D.
Thin Layer Chromatography
Show solution
Solution
UV-Vis Spectroscopy can be used to identify metal cations based on their characteristic absorbance spectra.
Correct Answer:
A
— UV-Vis Spectroscopy
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Q. Which qualitative analysis technique can separate amino acids based on their charge?
A.
Thin-layer chromatography
B.
Gel electrophoresis
C.
Gas chromatography
D.
Liquid-liquid extraction
Show solution
Solution
Gel electrophoresis separates amino acids based on their charge and size, making it effective for qualitative analysis.
Correct Answer:
B
— Gel electrophoresis
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Q. Which qualitative analysis technique is best for separating complex mixtures of organic compounds?
A.
Gas Chromatography
B.
Liquid Chromatography
C.
Paper Chromatography
D.
Capillary Electrophoresis
Show solution
Solution
Liquid Chromatography is effective for separating complex mixtures of organic compounds based on their interactions with the stationary phase.
Correct Answer:
B
— Liquid Chromatography
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Q. Which qualitative analysis technique is best suited for separating charged particles in a solution?
A.
Chromatography
B.
Electrophoresis
C.
Spectroscopy
D.
Titration
Show solution
Solution
Electrophoresis is the best technique for separating charged particles in a solution based on their charge and size.
Correct Answer:
B
— Electrophoresis
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Q. Which qualitative analysis technique is most effective for detecting trace metals in a sample?
A.
Atomic absorption spectroscopy
B.
Nuclear magnetic resonance
C.
Infrared spectroscopy
D.
Gas chromatography
Show solution
Solution
Atomic absorption spectroscopy is highly effective for detecting trace metals due to its sensitivity and specificity.
Correct Answer:
A
— Atomic absorption spectroscopy
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Q. Which qualitative analysis technique uses a gel medium to separate ions based on their charge?
A.
Gas Chromatography
B.
Capillary Electrophoresis
C.
High-Performance Liquid Chromatography
D.
Mass Spectrometry
Show solution
Solution
Capillary Electrophoresis separates ions based on their charge and size using a gel medium, making it suitable for qualitative analysis.
Correct Answer:
B
— Capillary Electrophoresis
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Q. Which reaction mechanism is primarily involved in the nucleophilic substitution of alkyl halides?
A.
SN1
B.
SN2
C.
E1
D.
E2
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Solution
The SN2 mechanism involves a direct nucleophilic attack on the alkyl halide, resulting in a one-step substitution reaction.
Correct Answer:
B
— SN2
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Q. Which reagent is commonly used in the qualitative analysis of halides to form a precipitate?
A.
Barium chloride
B.
Silver nitrate
C.
Lead(II) nitrate
D.
Calcium sulfate
Show solution
Solution
Silver nitrate is used to test for halides, forming a precipitate of silver halide when halide ions are present.
Correct Answer:
B
— Silver nitrate
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Q. Which reagent is commonly used to confirm the presence of chloride ions in a solution?
A.
Barium nitrate
B.
Silver nitrate
C.
Calcium hydroxide
D.
Sodium sulfate
Show solution
Solution
Silver nitrate is used to precipitate silver chloride when chloride ions are present, confirming their presence.
Correct Answer:
B
— Silver nitrate
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Q. Which reagent is commonly used to confirm the presence of sulfate ions in a qualitative analysis?
A.
Barium chloride
B.
Silver nitrate
C.
Hydrochloric acid
D.
Ammonium hydroxide
Show solution
Solution
Barium chloride is used to confirm the presence of sulfate ions, as it forms a white precipitate of barium sulfate when sulfate is present.
Correct Answer:
A
— Barium chloride
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Q. Which spectroscopic technique is best suited for identifying functional groups in organic compounds?
A.
Nuclear Magnetic Resonance (NMR)
B.
Infrared (IR) Spectroscopy
C.
Ultraviolet-Visible (UV-Vis) Spectroscopy
D.
Mass Spectrometry
Show solution
Solution
Infrared (IR) Spectroscopy is particularly useful for identifying functional groups due to characteristic absorption bands.
Correct Answer:
B
— Infrared (IR) Spectroscopy
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Q. Which spectroscopic technique is commonly used to identify metal ions in a sample?
A.
Infrared Spectroscopy
B.
Nuclear Magnetic Resonance
C.
Atomic Absorption Spectroscopy
D.
Mass Spectrometry
Show solution
Solution
Atomic Absorption Spectroscopy (AAS) is widely used for the qualitative and quantitative analysis of metal ions in various samples.
Correct Answer:
C
— Atomic Absorption Spectroscopy
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Q. Which spectroscopic technique is most effective for identifying functional groups in organic compounds?
A.
NMR
B.
UV-Vis
C.
IR
D.
Mass Spectrometry
Show solution
Solution
Infrared (IR) spectroscopy is particularly effective for identifying functional groups due to characteristic absorption bands.
Correct Answer:
C
— IR
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Q. Which spectroscopy technique is best suited for identifying functional groups in organic ions?
A.
Infrared Spectroscopy
B.
Ultraviolet-Visible Spectroscopy
C.
Nuclear Magnetic Resonance
D.
Raman Spectroscopy
Show solution
Solution
Infrared Spectroscopy is particularly effective for identifying functional groups in organic compounds by measuring molecular vibrations.
Correct Answer:
A
— Infrared Spectroscopy
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Q. Which spectroscopy technique is best suited for identifying functional groups in organic compounds?
A.
Infrared Spectroscopy
B.
Nuclear Magnetic Resonance
C.
Mass Spectrometry
D.
Raman Spectroscopy
Show solution
Solution
Infrared Spectroscopy is particularly effective for identifying functional groups based on their characteristic absorption of infrared light.
Correct Answer:
A
— Infrared Spectroscopy
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Q. Which spectroscopy technique is most suitable for identifying functional groups in organic compounds?
A.
UV-Vis Spectroscopy
B.
NMR Spectroscopy
C.
Mass Spectrometry
D.
Infrared Spectroscopy
Show solution
Solution
Infrared Spectroscopy is effective for identifying functional groups due to the characteristic absorption of molecular vibrations.
Correct Answer:
D
— Infrared Spectroscopy
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Q. Which technique is best suited for separating and identifying amino acids in a mixture?
A.
Gas chromatography
B.
High-performance liquid chromatography
C.
Thin-layer chromatography
D.
Capillary electrophoresis
Show solution
Solution
Capillary electrophoresis is particularly effective for separating and identifying amino acids due to their charge and size differences.
Correct Answer:
D
— Capillary electrophoresis
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