The Qualitative Analysis of Ions – Applications section demonstrates how classical ion analysis techniques are used in laboratories, industry, environment, medicine, and quality control . This module is designed for Class 11–12 students and undergraduate learners , helping them connect theory of salt analysis with real-world chemical identification .
In this section, you will explore:
Laboratory applications – identification of unknown inorganic salts and verification of sample composition
Industrial quality control – detection of metal ions and anions in raw materials and finished products
Environmental analysis – testing water and soil samples for harmful or excess ions
Pharmaceutical and chemical industries – purity checks and impurity detection
Clinical and biological relevance (introductory) – detection of ions in body fluids and diagnostic samples
Geological and material testing – mineral and ore identification
Educational and research applications – preliminary analysis before instrumental methods
NCERT- and UG-aligned explanations , supported by real-life examples, reaction-based case studies, MCQs, and practical-oriented questions
The content is structured to enhance practical relevance , improve analytical decision-making , and prepare students for application-based questions in exams and laboratory assessments .
Develop a practical understanding of Qualitative Analysis of Ions by exploring its applications across science and industry , strengthening both academic learning and chemical insight .
Q. In qualitative analysis, what does the presence of a white precipitate indicate when testing for chloride ions?
A.
Presence of sulfate ions
B.
Presence of phosphate ions
C.
Presence of chloride ions
D.
Presence of nitrate ions
Show solution
Solution
A white precipitate formed when adding silver nitrate to a solution indicates the presence of chloride ions.
Correct Answer:
C
— Presence of chloride ions
Learn More →
Q. In qualitative analysis, what does the term 'chromatographic retention time' refer to?
A.
The time taken for a sample to reach the detector
B.
The time taken for a solvent to evaporate
C.
The time taken for a compound to elute from the column
D.
The time taken for a reaction to complete
Show solution
Solution
Chromatographic retention time refers to the time taken for a compound to elute from the column, which helps in identifying the compound.
Correct Answer:
C
— The time taken for a compound to elute from the column
Learn More →
Q. In qualitative analysis, what does the term 'colorimetric analysis' refer to?
A.
Measuring the mass of a sample
B.
Determining the concentration of a colored solution
C.
Identifying ions based on their color change
D.
Separating ions by size
Show solution
Solution
Colorimetric analysis refers to determining the concentration of a colored solution, which can indicate the presence of specific ions.
Correct Answer:
B
— Determining the concentration of a colored solution
Learn More →
Q. In qualitative analysis, what does the term 'precipitation reaction' refer to?
A.
The formation of a gas
B.
The formation of a solid from a solution
C.
The change of color in a solution
D.
The separation of ions by size
Show solution
Solution
A precipitation reaction refers to the formation of a solid (precipitate) from a solution when certain ions react with each other.
Correct Answer:
B
— The formation of a solid from a solution
Learn More →
Q. What does a positive test for sulfate ions typically produce when barium chloride is added?
A.
A blue solution
B.
A white precipitate
C.
A yellow solution
D.
No change
Show solution
Solution
A positive test for sulfate ions produces a white precipitate of barium sulfate when barium chloride is added.
Correct Answer:
B
— A white precipitate
Learn More →
Q. What is the main advantage of using gas chromatography for qualitative analysis?
A.
It can analyze solid samples directly
B.
It provides high resolution and sensitivity
C.
It is the fastest method available
D.
It requires no sample preparation
Show solution
Solution
Gas chromatography provides high resolution and sensitivity, making it an excellent choice for qualitative analysis of volatile compounds.
Correct Answer:
B
— It provides high resolution and sensitivity
Learn More →
Q. What is the primary purpose of using flame tests in qualitative analysis of ions?
A.
To determine the concentration of ions
B.
To identify the presence of specific metal ions
C.
To separate ions in a mixture
D.
To measure the pH of a solution
Show solution
Solution
Flame tests are used to identify the presence of specific metal ions based on the characteristic colors they emit when heated in a flame.
Correct Answer:
B
— To identify the presence of specific metal ions
Learn More →
Q. What is the role of indicators in titration for qualitative analysis?
A.
To increase the reaction rate
B.
To provide a color change at the endpoint
C.
To stabilize the solution
D.
To separate the ions
Show solution
Solution
Indicators are used in titrations to provide a visual color change at the endpoint, helping to identify the completion of the reaction.
Correct Answer:
B
— To provide a color change at the endpoint
Learn More →
Q. What is the significance of using UV-Vis spectroscopy in qualitative analysis?
A.
To measure the mass of ions
B.
To identify the presence of colored ions
C.
To separate ions based on size
D.
To determine the boiling point of a solution
Show solution
Solution
UV-Vis spectroscopy is significant in qualitative analysis as it can identify the presence of colored ions based on their absorbance characteristics.
Correct Answer:
B
— To identify the presence of colored ions
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
Q. Which technique is commonly used to separate and identify anions in a mixture?
A.
Gas chromatography
B.
High-performance liquid chromatography
C.
Ion chromatography
D.
Capillary electrophoresis
Show solution
Solution
Ion chromatography is specifically designed for the separation and identification of anions in a mixture.
Correct Answer:
C
— Ion chromatography
Learn More →
Q. Which technique is commonly used to separate anions in qualitative analysis?
A.
Gas chromatography
B.
Thin-layer chromatography
C.
Capillary electrophoresis
D.
High-performance liquid chromatography
Show solution
Solution
Capillary electrophoresis is effective for separating anions based on their charge and size, making it suitable for qualitative analysis.
Correct Answer:
C
— Capillary electrophoresis
Learn More →
Showing 1 to 14 of 14 (1 Pages)
