Organic Reactions & Conversions · JEE Main previous year questions

2026 23 questions

1. Q632026 · 8 Apr 2026 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: B

2. Q672026 · 8 Apr 2026 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: C

3. Q672026 · 6 Apr 2026 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: B

4. Q662026 · 6 Apr 2026 · Shift 2
   
   1. A.Both Statement I and Statement II are true
   2. B.Both Statement I and Statement II are false
   3. C.Statement I is true but Statement II is false
   4. D.Statement I is false but Statement II is true
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   Answer: D

5. Q672026 · 6 Apr 2026 · Shift 2
   
   1. A.Benzene
   2. B.Phenol
   3. C.Propanol
   4. D.Chlorobenzene
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   Answer: A

6. Q692026 · 6 Apr 2026 · Shift 2
   
   1. A.$12$
   2. B.$16$
   3. C.$14$
   4. D.$18$
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   Answer: D

7. Q672026 · 5 Apr 2026 · Shift 1

   Consider compounds A, B and C with following structural formulae $\text{A}={\text{CH}}_3-{\text{CH}}_2-{\text{CH}}_2-{\text{CH}}_2-{\text{CH}}_2-\text{OH}$ $\text{B}={\text{CH}}_2=\text{CH}-{\text{CH}}_2-{\text{CH}}_2-{\text{CH}}_3$ $\text{C}=\text{HO}-{\text{CH}}_2-{\text{CH}}_2-\text{CH(OH)}-{\text{CH}}_3$ For the conversion of B from A, reagent (D) required is _______ and structural formula of product (E) obtained when C undergoes same reaction using excess reagent (D) is _______.

   1. A.$\text{D: }\text{Conc. }{\text{H}}_2{\text{SO}}_4;\text{E: }{\text{CH}}_2=\text{CH}-{\text{CH(OH)CH}}_3$
   2. B.$\text{D: }\text{PCC};\text{E: }\text{HO}-{\text{CH}}_2-{\text{CH}}_2-\text{CH}={\text{CH}}_2$
   3. C.$\text{D: }\text{PCC};\text{E: }{\text{CH}}_2=\text{CH}-\text{CH}={\text{CH}}_2$
   4. D.$\text{D: }\text{Conc. }{\text{H}}_2{\text{SO}}_4\text{ or }{\text{H}}_3{\text{PO}}_4;\text{E: }{\text{CH}}_2=\text{CH}-\text{CH}={\text{CH}}_2$
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   Answer: D

8. Q652026 · 5 Apr 2026 · Shift 2
   
   1. A.2-Chloropropanoic acid
   2. B.3-Chloropropanoic acid
   3. C.1-Chloropropane
   4. D.2-Chloropropane
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   Answer: A

9. Q672026 · 4 Apr 2026 · Shift 1
   
   1. A.1-Bromo-4-nitrobenzene
   2. B.1, 3, 5-Tribromo-2-nitrobenzene
   3. C.4-Bromo-1-nitrobenzene
   4. D.1, 3, 5-Tribromobenzene
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   Answer: B

10. Q722026 · 4 Apr 2026 · Shift 1· Numerical answer
    
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    Answer: 78

11. Q642026 · 4 Apr 2026 · Shift 2
    
    1. A.90
    2. B.118
    3. C.160
    4. D.125
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    Answer: B

12. Q722026 · 4 Apr 2026 · Shift 2· Numerical answer

    For the following reaction at $50{}^{\circ }\mathrm{C}$ and at $2\mathrm{atm}$ pressure, $2{\mathrm{N}}_2{\mathrm{O}}_5(\mathrm{g})\rightleftharpoons 2{\mathrm{N}}_2{\mathrm{O}}_4(\mathrm{g})+{\mathrm{O}}_2(\mathrm{g})$ ${\mathrm{N}}_2{\mathrm{O}}_5$ is $50\%$ dissociated. The magnitude of standard free energy change at this temperature is $x$. $x=$ ____ $\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}$ [Nearest integer]. Given : $\mathrm{R}=8.314\mathrm{J}\mathrm{mo}{\mathrm{l}}^{-1}{\mathrm{K}}^{-1}$, $\log 2=0.30$, $\log 3=0.48$, $\ln 10=2.303$, ${}^{\circ }\mathrm{C}+273=\mathrm{K}$

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    Answer: 2474

13. Q682026 · 2 Apr 2026 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
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    Answer: B

14. Q752026 · 2 Apr 2026 · Shift 2· Numerical answer
    
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    Answer: 1

15. Q542026 · 28 Jan 2026 · Shift 1
    
    1. A.simple distillation
    2. B.sublimation
    3. C.fractional distillation
    4. D.steam distillation
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    Answer: C

16. Q622026 · 28 Jan 2026 · Shift 1
    
    1. A.Compound y will dissolve in $\mathrm{NaHC}{\mathrm{O}}_3$ and evolve a gas.
    2. B.Compound x is more acidic than compound y .
    3. C.Both compounds x and y will dissolve in $\mathrm{NaOH}$ .
    4. D.Both compounds x and y will burn with sooty flame.
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    Answer: B

17. Q682026 · 28 Jan 2026 · Shift 1
    
    1. A.
    2. B.
    3. C.
    4. D.
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    Answer: D

18. Q682026 · 28 Jan 2026 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
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    Answer: A

19. Q692026 · 24 Jan 2026 · Shift 1

    A hydroxy compound $(X)$ with molar mass $122\mathrm{g}\mathrm{mo}{\mathrm{l}}^{-1}$ is acetylated with acetic anhydride, using a large excess of the reagent ensuring complete acetylation of all hydroxyl groups. The product obtained has a molar mass of $290\mathrm{g}\mathrm{mo}{\mathrm{l}}^{-1}$. The number of hydroxyl groups present in compound $(X)$ is:

    1. A.2
    2. B.4
    3. C.3
    4. D.5
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    Answer: B

20. Q622026 · 23 Jan 2026 · Shift 1
    
    1. A.
    2. B.
    3. C.
    4. D.
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    Answer: B

21. Q652026 · 23 Jan 2026 · Shift 1
    
    1. A.
    2. B.
    3. C.
    4. D.
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    Answer: A

22. Q542026 · 23 Jan 2026 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
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    Answer: D

23. Q752026 · 21 Jan 2026 · Shift 1· Numerical answer

    Consider the following reaction sequence $$\text{Benzene}\underset{\text{333 K}}{\overset{conc.HN{\mathrm{O}}_3+conc.{\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4}{\to }}\mathrm{P}\underset{\text{2. pH neutralised}}{\overset{\text{1. Sn/HCl}/\Delta }{\to }}\mathrm{Q}\stackrel{(\mathrm{C}{\mathrm{H}}_3\mathrm{CO}{)}_2\mathrm{O}}{\to }\mathrm{R}\stackrel{conc.HN{\mathrm{O}}_3+conc.{\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4}{\to }\underset{\text{(major product)}}{\mathrm{S}}\underset{\text{2. pH neutralised}}{\overset{\text{1. HCl/EtOH},\Delta }{\to }}\mathrm{T}$$ The percentage of nitrogen in product ' T ' formed is ____ %. (Nearest integer) (Given molar mass in $\mathrm{g}\mathrm{mo}{\mathrm{l}}^{-1}$ $\mathrm{H}:1,\mathrm{C}:12,\mathrm{N}:14,\mathrm{O}:16$)

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    Answer: 20