Few of the important topics from organic chemistry for JENPAS UG are like hyperconjugation, optical isomerism, alkynes, phenols, aldol condensation, acidity of carboxylic acids etc. Mostly questions are asked from these topics for the JENPAS UG exam.
Organic chemistry section in the JENPAS UG exam consist of questions mainly from topics like hyperconjugation, optical isomerism, alkynes, phenols, aldol condensation, acidity of carboxylic acids etc. To prepare thoroughly for this particular section we recommend you to chalk out the vital topics that are mostly repeated in the exam. Along with the topics you will also find JENPAS UG Organic Chemistry Questions that are mostly similar and repetitive from previous years. Academic experts and also students who have cleared the JENPAS UG exam in the last few years recommend practicing important questions along with the previous year question papers. Lets begin with the article.
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JENPAS Organic Chemistry Questions and Answers
You can check the important questions from the below table.
Organic Chemistry Important Questions JENPAS | Options | Correct Answer |
|---|---|---|
The IUPAC name of CH3–CH=CH2 is | a) Propane b) Propene c) Propanol d) Propyne | Propene |
Which of the following has the highest boiling point? | a) Butane b) Butanol c) Butanal d) Butanone | Butanol |
Which of the following shows resonance? | a) CH4 b) CO2 c) Benzene d) C2H6 | Benzene |
Which is the most stable carbocation? | a) CH₃⁺ b) 1° carbocation c) 2° carbocation d) 3° carbocation | 3° carbocation |
Which type of isomerism is shown by C2H6O? | a) Structural isomerism b) Optical isomerism c) Geometrical isomerism d) Chain isomerism | Structural isomerism |
Electrophiles are | a) Electron rich species b) Electron deficient species c) Neutral species d) Radicals only | Electron deficient species |
The order of stability of carbocations is | a) 1° > 2° > 3° b) 3° > 2° > 1° c) 2° > 3° > 1° d) 3° > 1° > 2° | 3° > 2° > 1° |
The general formula of alkanes is | a) CnH2n b) CnH2n+2 c) CnH2n–2 d) CnHn | CnH2n+2 |
Which test is used to distinguish alkanes from alkenes? | a) Iodoform test b) Tollen’s test c) Bromine water test d) Fehling’s test | Bromine water test |
The major product of the reaction of 2-butene with HBr in presence of peroxide is | a) 2-bromobutane b) 1-bromobutane c) 3-bromobutane d) 2,3-dibromobutane | 1-bromobutane |
Benzene undergoes which type of reaction predominantly? | a) Addition b) Elimination c) Substitution d) Oxidation | Substitution |
The monomer of polystyrene is | a) Ethene b) Propene c) Styrene d) Vinyl chloride | Styrene |
Ethyl alcohol reacts with sodium to liberate | a) HCl b) H2 c) CO2 d) O2 | H2 |
Phenol gives violet colour with | a) FeCl3 b) Br2 c) HNO3 d) NaOH | FeCl3 |
In Friedel–Crafts alkylation, the catalyst used is: | a) HCl b) AlCl₃ c) NaOH d) H₂SO₄ | AlCl₃ |
Lucas test is used to distinguish between | a) Aldehydes and ketones b) 1°, 2°, and 3° alcohols c) Alkanes and alkenes d) Phenols and alcohols | 1°, 2°, and 3° alcohols |
Formaldehyde is represented as | a) CH3CHO b) HCHO c) CH3COCH3 d) HCOOH | HCHO |
Fehling’s solution is used to detect | a) Aromatic ketones b) Aromatic aldehydes c) Aliphatic aldehydes d) Alcohols | Aliphatic aldehydes |
The product formed when acetic acid reacts with ethanol in presence of conc. H2SO4 is | a) Acetone b) Ethyl acetate c) Acetaldehyde d) Methyl alcohol | Ethyl acetate |
Which one gives effervescence with NaHCO₃ solution? | a) Phenol b) Alcohol c) Carboxylic acid d) Aldehyde | Carboxylic acid |
Which compound gives a silver mirror test? | a) Ketone b) Aldehyde c) Ester d) Ether | Aldehyde |
Which of the following is optically active? | a) 2-Butanol b) Ethanol c) Propanol d) Acetone | 2-Butanol |
The monomer of proteins is | a) Glucose b) Amino acid c) Fatty acid d) Nucleotide | Amino acid |
Which vitamin is fat-soluble? | a) Vitamin B b) Vitamin C c) Vitamin D d) Vitamin H | Vitamin D |
Which of the following is a functional isomer of ethanol? | a) Dimethyl ether b) Propanol c) Butanol d) Ethanal | Dimethyl ether |
Which reagent is used to distinguish between alkene and alkyne? | a) Tollen’s reagent b) Bromine water c) Baeyer's reagent (alkaline KMnO₄) d) Fehling’s solution | Baeyer's reagent |
Which reagent converts alcohol to aldehyde? | a) LiAlH₄ b) PCC (Pyridinium chlorochromate) c) H₂ / Pt d) HI | PCC |
The sugar present in DNA is | a) Glucose b) Ribose c) Deoxyribose d) Fructose | Deoxyribose |
Also Read: JENPAS UG 2025 Algebra & Quadratic Questions and Answers for Math Practice
Important Topics from Organic Chemistry for JENPAS UG
Here are the important topics that you must prepare for the exam.
Topics | Sub-Topics |
|---|---|
Some Basic Principles of Organic Chemistry |
|
Hydrocarbons |
|
Haloalkanes & Haloarenes |
|
Alcohols, Phenols, and Ethers |
|
Aldehydes, Ketones, and Carboxylic Acids |
|
Amines |
|
Biomolecules |
|
Polymers & Chemistry in Everyday Life |
|
Also Read: What are the Courses in JENPAS UG 2025?
Best Books of Organic Chemistry
You can check the list of books to correctly solve JENPAS Organic Chemistry Questions and Answers.
- NCERT Chemistry
- Organic Chemistry by O.P. Tandon
- A Textbook of Organic Chemistry by R.K. Gupta
- Elementary Problems in Organic Chemistry by M.S. Chouhan
- Objective Chemistry (Vol. 2) by Dinesh
- Organic Chemistry by Morrison & Boyd
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FAQs
General Organic Chemistry (GOC), Hydrocarbons, Alcohols, Aldehydes, Ketones, Carboxylic acids, Amines, Haloalkanes, and Biomolecules carry high weightage.
Yes, basic concepts of Glucose, Fructose, Amino acids, Proteins, DNA/RNA structure, and polymers like Nylon, Bakelite, Teflon are asked.
Extremely important. Concepts like inductive effect, resonance, hyperconjugation, acidity/basicity order, and carbocation stability form the base for many MCQs.
Yes. Reactions like Cannizzaro, Aldol condensation, Kolbe’s reaction, Hoffmann bromamide, and Williamson’s ether synthesis are frequently asked.
Most questions are concept-based MCQs focusing on reaction mechanisms, functional groups, isomerism, and basic named reactions. Direct memory-based as well as application-type questions are common.
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