Qualitative Analysis of Ions - Numerical Applications

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The Qualitative Analysis of Ions – Numerical Applications section integrates quantitative reasoning with classical qualitative analysis, helping students apply numerical calculations to explain precipitation, separation, and confirmation of ions. This module is designed for advanced school students, undergraduate learners, and competitive exam aspirants, where numbers-based reasoning strengthens conceptual clarity.

In this section, you will work on:

  • Ksp-based calculations to predict precipitation and selective separation of ions

  • Common ion effect numericals in group analysis

  • pH and concentration calculations affecting solubility and precipitation

  • Ionic concentration comparisons for group reagent selection

  • Complex formation equilibrium numericals (Kf and conditional solubility)

  • Redox-based stoichiometric calculations in qualitative reactions

  • Limiting reagent and equilibrium shift problems in confirmatory tests

  • Exam-oriented numerical MCQs with step-by-step solutions

  • PYQ-style numerical problems aligned with NEET/JEE/UG exams

The content is structured to bridge theory and calculation, improve analytical accuracy, and help students handle numerical-based qualitative analysis questions confidently.

Master numerical applications in Qualitative Analysis of Ions to strengthen equilibrium understanding and gain an edge in competitive and undergraduate examinations.

Q. In a titration to identify chloride ions, which indicator is commonly used?
  • A. Phenolphthalein
  • B. Methyl orange
  • C. Silver nitrate
  • D. Chromate
Q. In electrophoresis, what property of ions primarily determines their movement?
  • A. Mass
  • B. Charge
  • C. Size
  • D. Solubility
Q. In UV-Vis spectroscopy, what does a peak at 260 nm typically indicate?
  • A. Presence of proteins
  • B. Presence of nucleic acids
  • C. Presence of carbohydrates
  • D. Presence of lipids
Q. What is the main advantage of using ion chromatography for qualitative analysis?
  • A. High sensitivity
  • B. Ability to analyze gases
  • C. Separation of ions in a single run
  • D. Low cost
Q. What is the primary purpose of using a flame test in qualitative analysis?
  • A. To determine the concentration of ions
  • B. To identify the presence of specific metal ions
  • C. To separate different ions
  • D. To measure the pH of a solution
Q. What is the principle behind the use of chromatography for qualitative analysis?
  • A. Separation based on charge
  • B. Separation based on size
  • C. Separation based on solubility
  • D. Separation based on boiling point
Q. What is the role of a titrant in a titration for qualitative analysis?
  • A. To provide a color change
  • B. To react with the analyte
  • C. To stabilize the solution
  • D. To dilute the sample
Q. What is the significance of using a buffer solution in qualitative analysis?
  • A. To increase the solubility of ions
  • B. To maintain a constant pH
  • C. To enhance the color intensity
  • D. To precipitate unwanted ions
Q. Which analytical technique is best suited for the separation of anions in a mixture?
  • A. Gas chromatography
  • B. High-performance liquid chromatography
  • C. Thin-layer chromatography
  • D. Capillary electrophoresis
Q. Which of the following ions can be detected using a colorimetric method?
  • A. Sodium
  • B. Calcium
  • C. Iron
  • D. Potassium
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
Q. Which technique is best suited for separating anions in a mixture?
  • A. Gas chromatography
  • B. High-performance liquid chromatography
  • C. Capillary electrophoresis
  • D. Mass spectrometry
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