Organic chemistry in NEET is one branch that most students fear. That is why we wanted to help and enable NEET applicants easily crack the organic chemistry questions by providing them with important/ repeated/ expected question types or chapters from NEET organic chemistry in specific. For this, our Chemistry Bench expert tutors underwent a comparative study between NEET Chemistry previous year question paper (NEET 2020 and NEET 2021 question papers) and have come up with NEET Organic Chemistry 2022 expected questions. The topics include isomerism, properties, and conversion reactions.
NEET Organic Chemistry 2022
1. NEET Organic Chemistry Chapters
- Some basic principles and techniques
- Hydrocarbons
- Haloalkanes and Haloarenes
- Alcohol, Phenol, and Ether
- Carbonyl compound
- Amine
- Biomolecules
- Polymers
- Chemistry in Everyday Life
Refer to this page for the average number of questions expected from these chapters!
2. NEET Organic Chemistry overall Weightage
It is expected that this year’s weightage for organic chemistry would be around 25-30%.
3. NEET Organic Chemistry Syllabus/ Class-wise weightage
Class 11 | Organic Chemistry | ~4 questions |
| Class 12 | Organic Chemistry | ~9 questions |
Organic Chemistry Questions of NEET 2020 Question Paper
Q1: The compound which shows metamerism is
(1) C3H6O
(2) C4H10O
(3) C5H12
(4) C3H8O
Ans: (2)
With the formula C4H10O, the possible ether will be
A- diethyl ether
B- methyl n propyl ether
C- isopropyl methyl ether
Q2: An alkene on ozonolysis gives methanal as one of the products. Its structure is
Ans: (1)
The structure will give methanal as one of the products
Q3: Reaction between benzaldehyde and acetophenone in the presence of dilute NaOH is known as
(1) Cross Cannizzaro’s reaction
(2) Cross Aldol condensation
(3) Aldol condensation
(4) Cannizzaro’s reaction
Ans: (1)
Cannizzaro is a chemical reaction that involves the base-induced disproportion of two molecules of a non-enolizable aldehyde to give primary alcohol and carboxylic acid.
Q4: Elimination reaction of 2-Bromo-pentane to form pent-2-ene is
(a) β-Elimination reaction
(b) Follows Zaitsev rule
(c) Dehydrohalogenation reaction
(d) Dehydration reaction
(1) (b), (c), (d)
(2) (a), (b), (d)
(3) (a), (b), (c)
(4) (a), (c), (d)
Ans: (3)
This reaction is a β-elimination. Hydrogen is removed from β− carbon, and halogen from α-carbon, hence dehydrohalogenation reaction. Pent-2-ene is a major product known as Saytzeff’s and is a more stable alkene than Pent-1-ene. It follows the Zaitsev rule.
Q5: Which of the following alkane cannot be made in good yield by Wurtz reaction?
(1) n-Heptane
(2) n-Butane
(3) n-Hexane
(4) 2,3-Dimethylbutane
Ans: (1) n-heptane can not be prepared by this method as it is an unsymmetrical alkene.
Q6: Which of the following amine will give the carbylamine test?
Ans: (3)
Only primary amines give this reaction. Aniline is a primary amine.
Q7: Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give
(1) Tert. butyl alcohol
(2) Isobutyl alcohol
(3) Isopropyl alcohol
(4) Sec. butyl alcohol
Ans:(1)
Tert butyl Alcohol
Q8: A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following
(1) −R effect of −CH3 groups
(2) Hyperconjugation
(3) −I effect of −CH3 groups
(4) +R effect of −CH3 groups
Ans: (2)
Because of the +I effect and hyperconjugation, tertiary carbocations are stable.
Q9: Identify compound X in the following sequence of reactions
Ans: (1)
In the first step, free radical chlorination takes place and in the second step, the stable product benzaldehyde is formed after hydrolysis.
Organic Chemistry Questions of NEET 2021 Question Paper (Last year neet question paper)
Q1: The correct sequence of bond enthalpy of ‘C–X’ bond is
(1) CH3−F < CH3−Cl > CH3−Br > CH3−I
(2) CH3−Cl > CH3−F > CH3−Br > CH3−I
(3) CH3−F < CH3−Cl < CH3−Br < CH3−I
(4) CH3−F > CH3−Cl > CH3−Br > CH3−I
Ans: (C)
The size of the halogen atom increases from F to I, hence bond length from C-F to C-I increases due to decrease of effective nuclear charges on electrons. Bond enthalpy from CH3-F to CH3-I decreases.
Q2: The correct structure of 2,6-dimethyl-dec-4-ene is
(1)
(2)
(3)
(4)
Ans: (2)
2,6−Dimethyldec-4-ene
Q3: What is the IUPAC name of the organic compound formed in the following chemical reaction?
Ans: (2)
2-methyl butan-2-ol
Acetone with grignard reaction is a nucleophilic addition reaction.
The compound contains
- four carbons in the longest chain
- the main functional group is alcohol (suffix name: ol)
- methyl group attached at 2nd position
Hence, the name is 2-methyl bultan-2-ol
Q4: The major product formed in the dehydrohalogenation reaction of 2-Bromo pentane is Pent-2-ene. This product formation is based on the?
(1) Hofmann Rule
(2) Huckel’s Rule
(3) Saytzeff’s Rule
(4) Hund’s Rule
Ans: (3)
Major product formed in dehydrohalogenation reaction of 2-bromopentane is pent-2-ene because according to Saytzeff’s rule, in dehydrohalogenation reactions, the preferred product is that alkene which has greater number of the alkyl group(s) attached to the doubly bonded carbon atoms.
Q5: An organic compound contains 78% (by wt.) carbon and the remaining percentage of hydrogen. The right option for the empirical formula of this compound is
[Atomic wt. of C is 12, H is 1]
(1) CH3
(2) CH4
(3) CH
(4) CH2
Ans: (1)
Based on the above calculation, the possible empirical formula is CH3.
Q6: Dihedral angle of least stable conformer of ethane is :
(1) 60
(2) 0
(3) 120
(4) 180
Ans: (2)
Ethane has two conformers
(i) Eclipsed
(ii) Staggered
Eclipsed conformer is least stable while staggered conformer is most stable. In eclipsed conformer, the dihedral angle is 0 degrees.
Q7: The major product of the following chemical reaction is
Ans:(3)
Q8: Identify the compound that will react with Hinsberg’s reagent to give a solid that dissolves in alkali
(1)
(2)
(3)
(4)
Ans:(4)
Benzenesulphonyl chloride (C6H5SO2Cl) is also known as Hinsberg’s reagent.
The reaction of Hinsberg’s reagent (C6H5SO2Cl) with primary amine (CH3CH2NH2) yields N-ethylbenzene sulphonamide.
The reaction of Hinsberg’s reagent gives, N-Ethyl-N-Methyl benzene sulphonamide.
3 amine does not react with the Hinsberg reagent.
Dear NEET 2022 applicants!
By now, you might have obtained an idea of what kind of questions or from which chapters the major questions will come from organic chemistry in NEET 2022 (NEET Organic Chemistry 2022 Expected Questions). Also, you would have understood the importance of chemistry previous year question paper neet.
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