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Principles Related To Practical Chemistry Important Questions for NEET Chemistry - 2026

Q: 1. What are the most important NEET questions from the detection of extra elements in organic compounds?

For NEET, focus on questions asking about the Lassaigne’s test for detecting nitrogen, sulphur, and halogens. These often appear as multiple-choice or assertion-reason questions that test your grasp of the chemical reactions and color changes involved in the detection process.

Q: 2. Which functional group tests are frequently asked as exam-focused questions in NEET?

NEET repeatedly covers identification of hydroxyl, carbonyl, carboxyl, and amino groups in organic compounds. Practice expected questions on: Tollens’ or Fehling’s test (carbonyl groups) Ferric chloride test (phenols) Carbylamine test (amino group)

Q: 3. What types of NEET questions are expected from the preparation reactions of inorganic and organic compounds?

Questions on preparation of Mohr’s salt, potash alum, Acetanilide, iodoform often test steps, reagents, or balanced equations. Be ready for MCQs that ask you to identify reagents, sequence of steps, or the chemistry involved in these reactions.

Q: 4. How should I prepare for assertion-reason or statement-based questions on salt analysis for NEET?

Many NEET questions are assertion-reason or statement-type, focusing on the chemical principles behind cation and anion detection. Review the color changes, confirmatory reagents, and common mistakes. Make quick summary notes to remember each ion’s key detection point.

Q: 5. Are there specific numericals or MCQ patterns to practice from enthalpy and titration experiments?

Yes, NEET includes numericals based on enthalpy of solution, neutralization, and titration results. Be ready to solve: Calorimetry calculation questions Titration endpoint determination (e.g. oxalic acid vs KMnO4)

Q: 6. What revision tips can help solve NEET important questions from the chapter Principles Related To Practical Chemistry?

Revise the procedure steps, reagents, and color changes for functional group tests and salt analysis. Use short summary tables and practice MCQs. Don’t skip numericals from titration and enthalpy—they are easy scoring but often overlooked.

Q: 7. How can I identify high-yield MCQs from practical chemistry for NEET?

Look for questions based on concept application (e.g. matching tests with groups), trick options in assertion-reason pairs, and calculations involving titration or heat change. Practicing previous year NEET patterns will help you spot and answer these quicker.

Practice Principles Related To Practical Chemistry Important Questions - Free PDF Download

If you are preparing for NEET Chemistry, understanding the chapter Principles Related To Practical Chemistry is very important. This chapter covers key concepts you need for practical-based questions in the NEET exam. Vedantu offers specially selected NEET Important Questions with Answers for this chapter.

Here, you will find questions on detecting extra elements like Nitrogen, Sulphur, and halogens in organic compounds. It also covers identifying functional groups, preparing compounds like Mohr’s salt and potash alum, and understanding titration methods. This chapter also includes salt analysis, enthalpy experiments, and kinetics of chemical reactions.

Using these important questions helps you revise essential topics and strengthens your exam preparation. Download the NEET Important Questions PDF for Principles Related To Practical Chemistry for free and start practicing today.

Practice Principles Related To Practical Chemistry Important Questions - Free PDF Download

1. Multiple choice questions.

Q1. In Lassaigne’s test, presence of nitrogen in an organic compound is detected by the formation of:

(a) Prussian blue colour
(b) Violet colour
(c) Red colour
(d) Yellow precipitate

Answer: (a) Prussian blue colour.

Q2. Which of the following is used as an internal indicator in the titration of oxalic acid with KMnO₄?

(a) Starch
(b) Methyl orange
(c) KMnO₄ itself
(d) Phenolphthalein

Answer: (c) KMnO₄ itself.

Q3. Which cation does not produce a coloured precipitate with hydrogen sulfide in acidic medium?

(a) Cu²⁺
(b) Fe³⁺
(c) Zn²⁺
(d) Pb²⁺

Answer: (b) Fe³⁺.

Q4. The functional group detected by the addition of 2,4-dinitrophenylhydrazine to an organic compound is:

(a) Carboxyl group
(b) Amino group
(c) Carbonyl group
(d) Hydroxyl group

Answer: (c) Carbonyl group.

Q5. When iodoform test is performed, a yellow precipitate indicates the presence of:

(a) Methyl ketone group
(b) Carboxyl group
(c) Amino group
(d) Nitro group

Answer: (a) Methyl ketone group.

2. Very Short Answer (VSA).

Q1. Name the indicator used in the titration of a strong acid with a strong base.

Answer: Phenolphthalein is commonly used as an indicator in the titration of a strong acid with a strong base due to its sharp colour change near neutrality.

Q2. What is the formula of Mohr's salt?

Answer: The chemical formula of Mohr’s salt is (NH₄)₂SO₄·FeSO₄·6H₂O.

Q3. Which test is used to detect sulphur in organic compounds?

Answer: Sulphur in organic compounds is detected by Lassaigne’s test, where sodium fusion extract is treated with sodium nitroprusside, producing a violet colour if sulphur is present.

3. Short Answer Questions.

Q1. Describe the procedure and chemistry involved in the preparation of iodoform in the laboratory.

Answer: Iodoform is prepared by treating acetone or ethanol with iodine and sodium hydroxide. The reaction involves halogenation and subsequent hydrolysis, leading to the formation of yellow iodoform (CHI₃) precipitate. The process demonstrates the presence of a methyl ketone or ethanol group in the compound.

Q2. How is the enthalpy of solution of CuSO₄ determined experimentally?

Answer: The enthalpy of solution of CuSO₄ is determined by dissolving a known mass of the salt in water in a calorimeter and measuring the temperature change. Using the heat change, the enthalpy is calculated using the formula $q = m \times c \times \Delta T$.

Q3. Explain the steps involved in the qualitative analysis of a salt containing Pb²⁺ ion.

Answer: Pb²⁺ is identified by adding dilute HCl to the solution, resulting in a white precipitate of PbCl₂. The precipitate dissolves in hot water and can be confirmed by subsequent addition of potassium chromate, which gives a yellow precipitate of PbCrO₄.

4. True or False Questions.

Q1. Potash alum is an inorganic compound containing both potassium and aluminium ions.

Answer: True.

Q2. Phenolphthalein turns pink in acidic solution.

Answer: False.

3. Fill in the Blanks Questions.

Q1. The functional group detected by Tollen’s reagent is __________.

Answer: Aldehyde.

Q2. The yellow colour formed during the Lassaigne’s test with sodium nitroprusside indicates the presence of __________.

Answer: Sulphur.

Q3. In the preparation of lyophobic sols, the method generally used is __________.

Answer: Dispersion method.

Why Principles Related To Practical Chemistry Matter for NEET Aspirants

Understanding chemical detection methods and salt analysis helps you score efficiently in NEET Chemistry. These questions are frequently based on real laboratory techniques important for both exams and further studies in medical and science fields.

The chemistry of titrations, indicators, and compound preparation builds a strong foundation for NEET 2026 Chemistry. Focus on reactions like Mohr’s salt with KMnO₄ and iodoform tests, as these check both conceptual clarity and application skills in the exam.

Practice important NEET questions from this chapter to build confidence. A clear understanding of detection of functional groups and common laboratory principles can make challenging questions feel simple and approachable for every NEET aspirant.

FAQs on Principles Related To Practical Chemistry Important Questions for NEET Chemistry - 2026

1. What are the most important NEET questions from the detection of extra elements in organic compounds?

For NEET, focus on questions asking about the Lassaigne’s test for detecting nitrogen, sulphur, and halogens. These often appear as multiple-choice or assertion-reason questions that test your grasp of the chemical reactions and color changes involved in the detection process.

2. Which functional group tests are frequently asked as exam-focused questions in NEET?

NEET repeatedly covers identification of hydroxyl, carbonyl, carboxyl, and amino groups in organic compounds. Practice expected questions on:

Tollens’ or Fehling’s test (carbonyl groups)
Ferric chloride test (phenols)
Carbylamine test (amino group)

3. What types of NEET questions are expected from the preparation reactions of inorganic and organic compounds?

Questions on preparation of Mohr’s salt, potash alum, Acetanilide, iodoform often test steps, reagents, or balanced equations. Be ready for MCQs that ask you to identify reagents, sequence of steps, or the chemistry involved in these reactions.

4. How should I prepare for assertion-reason or statement-based questions on salt analysis for NEET?

Many NEET questions are assertion-reason or statement-type, focusing on the chemical principles behind cation and anion detection. Review the color changes, confirmatory reagents, and common mistakes. Make quick summary notes to remember each ion’s key detection point.

5. Are there specific numericals or MCQ patterns to practice from enthalpy and titration experiments?

Yes, NEET includes numericals based on enthalpy of solution, neutralization, and titration results. Be ready to solve:

Calorimetry calculation questions
Titration endpoint determination (e.g. oxalic acid vs KMnO₄)

6. What revision tips can help solve NEET important questions from the chapter Principles Related To Practical Chemistry?

Revise the procedure steps, reagents, and color changes for functional group tests and salt analysis. Use short summary tables and practice MCQs. Don’t skip numericals from titration and enthalpy—they are easy scoring but often overlooked.

7. How can I identify high-yield MCQs from practical chemistry for NEET?

Look for questions based on concept application (e.g. matching tests with groups), trick options in assertion-reason pairs, and calculations involving titration or heat change. Practicing previous year NEET patterns will help you spot and answer these quicker.