Purification & Characterisation of Organic Compounds — JEE Main PYQs & Practice Questions

Purification & Characterisation of Organic Compounds is a Chemistry chapter in the JEE Main syllabus. This page brings together 124 previous-year and practice questions on Purification & Characterisation of Organic Compounds, organised into 2 topics: Purification Methods and Quantitative Elemental Analysis. Most questions come with a step-by-step solution you can work through free in PrepWiser.

Download Purification & Characterisation of Organic Compounds JEE Main PYQs as a free PDF (with answer key)

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Chapter weightage: how many questions each chapter had per shift in the 2024–26 papers.

Purification Methods

• Thin layer chromatography of a mixture shows the following observation: The correct…
• The correct statement among the following, for a "chromatography" purification method is :
• Which of the following statement is correct for paper chromatography?
• Given below are two statements : one is labelled as Assertion A and the other is…
• Match List - I with List - II. List - I Purification technique | List - II Used to…
• Given below are two statements : Statement I : A mixture of C₁₂H₂₂O₁₁ (sugar) and NaCl…
• The adsorbent used in adsorption chromatography is/are - A. silica gel B. alumina C…
• A solution of m-chloronailimne, m-chlorophenol and m-chlorobenzoic acid in ethyal…
• Given below are two statements : Statement I : Vapours of the liquid with higher boiling…
• Chromatographic technique/s based on the principle of differential adsorption is / are…
• Which purification technique is used for high boiling organic liquid compound…
• Given below are two statements : Statement I : A mixture of chloroform and aniline can…
• The steam volatile compounds among the following are : Choose the correct answer from…
• R_f value for 2-methylpropene in a solvent system (Ethyl acetate + ether) is 0.42…
• Three organic compounds A, B and C were allowed to run in thin layer chromatography…
• Match List I with List II List - I (Technique) | List - II (Application; (A) |…
• Glycerol is separated in soap industries by :
• On a thin layer chromatographic plate, an organic compound moved by 3.5 cm, while the…
• Phenol on reaction with dilute nitric acid, gives two products. Which method will be…
• The separation of two coloured substances was done by paper chromatography. The…

Quantitative Elemental Analysis

• In Dumas method for the estimation of N₂, the sample is heated with copper oxide and the…
• Given below are two statements I and II. Statement I : Dumas method is used for…
• 0.400 g of an organic compound (X) gave 0.376 g of AgBr in Carius method for estimation…
• In Carius method of estimation of halogen, 0.45 g of an organic compound gave 0.36 g of…
• Following Kjeldahl's method, 1 g of organic compound released ammonia, that neutralised…
• Nitrogen can be estimated by Kjeldahl's method for which of the following compound?
• In Carius method 0.2425 g of an organic compound gave 0.5253 g silver chloride. The…
• An organic compound weighing 500 mg , produced 220 mg of CO₂, on complete combustion…
• The Lassiagne's extract is boiled with dil HNO₃ before testing for halogens because,
• Given below are two statements : Statement I : In 'Lassaigne's Test', when both nitrogen…
• Compound that will give positive Lassaigne's test for both nitrogen and halogen is :
• The transformation occurring in Duma's method is given below : C₂H₇N+(2x+y/2)CuO→…
• Lassaigne's test is used for detection of :
• In Kjeldahl's method for estimation of nitrogen, CuSO₄ acts as :
• The number of moles of CuO, that will be utilized in Dumas method for estimation…
• Complete combustion of X g of an organic compound gave 0.25 g of CO₂ and 0.12 g of H₂O…
• In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium…
• In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL…
• Kjeldahl's method cannot be used to estimate nitrogen for which of the following…
• A student has been given 0.314 g of an organic compound and asked to estimate Sulphur…

More Chemistry chapters

• Mole Concept & Stoichiometry
• Atomic Structure
• Gaseous State
• Chemical Thermodynamics
• Chemical Equilibrium
• Ionic Equilibrium
• Redox Reactions
• Solutions & Colligative Properties
• Electrochemistry
• Chemical Kinetics
• Solid State
• Surface Chemistry
• Nuclear & Radiochemistry
• Periodic Table & Periodicity
• Chemical Bonding & Molecular Structure
• Hydrogen & s-Block Elements
• p-Block Elements — Part I (Group 13 & 14)
• Environmental Chemistry
• p-Block Elements — Part II (Group 15-18)
• d & f Block Elements
• Coordination Compounds
• Metallurgy
• Qualitative Analysis — Salt Analysis
• General Organic Chemistry (GOC)
• Hydrocarbons — Alkanes
• Hydrocarbons — Alkenes & Alkynes
• Hydrocarbons — Aromatic (Arenes)
• Halogen Derivatives — Haloalkanes & Haloarenes
• Alcohols, Phenols & Ethers
• Aldehydes & Ketones
• Carboxylic Acids & Their Derivatives
• Amines & Diazonium Salts
• Carbohydrates & Biomolecules
• Polymers
• Chemistry in Everyday Life
• Practical Organic Chemistry

Frequently asked questions

How many Purification & Characterisation of Organic Compounds questions are there for JEE Main?

PrepWiser has 124 Purification & Characterisation of Organic Compounds questions for JEE Main, grouped into 2 topics such as Purification Methods and Quantitative Elemental Analysis.

Are these Purification & Characterisation of Organic Compounds questions from previous-year JEE Main papers?

Yes — most are genuine previous-year questions from past JEE Main papers, and the rest are practice questions written to match the JEE Main pattern and difficulty.

Where can I see the answers and solutions to these Purification & Characterisation of Organic Compounds questions?

Open any Purification & Characterisation of Organic Compounds question in PrepWiser (it is free) to attempt it; most come with a step-by-step solution.