Organic Reactions & Conversions · JEE Main previous year questions

2024 39 questions

1. Q612024 · 9 Apr 2024 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: B

2. Q652024 · 9 Apr 2024 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: A

3. Q802024 · 9 Apr 2024 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: B

4. Q782024 · 9 Apr 2024 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: B

5. Q752024 · 8 Apr 2024 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: B

6. Q762024 · 8 Apr 2024 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: D

7. Q832024 · 8 Apr 2024 · Shift 1· Numerical answer
   
   Show answer

   Answer: 5

8. Q862024 · 8 Apr 2024 · Shift 2· Numerical answer

   Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous $\mathrm{NaOH}$ after heating gives $x$ as the major product. The number of $\pi$ bonds in the product $x$ is ______.

   Show answer

   Answer: 9

9. Q642024 · 6 Apr 2024 · Shift 2
   
   1. A.
   2. B.
   3. C.
   4. D.
   Show answer

   Answer: A

10. Q662024 · 6 Apr 2024 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: B

11. Q682024 · 6 Apr 2024 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: A

12. Q752024 · 6 Apr 2024 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: A

13. Q672024 · 5 Apr 2024 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: B

14. Q682024 · 5 Apr 2024 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: B

15. Q722024 · 5 Apr 2024 · Shift 2

    $$\mathrm{C}{\mathrm{H}}_3\mathrm{C}{\mathrm{H}}_2-\mathrm{OH}\underset{\text{(iii) }\mathrm{NaOH},\mathrm{CaO},\mathrm{\Delta }}{\overset{\begin{array}{l}\text{(i) Jone’s Reagent}\\ \text{(ii) }\mathrm{KMn}{\mathrm{O}}_4\end{array}}{\to }}\mathrm{P}$$ Consider the above reaction sequence and identify the major product P.

    1. A.Methanoic acid
    2. B.Methoxymethane
    3. C.Methane
    4. D.Methanal
    Show answer

    Answer: C

16. Q742024 · 5 Apr 2024 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: C

17. Q822024 · 5 Apr 2024 · Shift 2· Numerical answer
    
    Show answer

    Answer: 4

18. Q702024 · 4 Apr 2024 · Shift 1
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: A

19. Q662024 · 4 Apr 2024 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: D

20. Q782024 · 4 Apr 2024 · Shift 2
    
    1. A.
    2. B.
    3. C.
    4. D.
    Show answer

    Answer: A

21. Q802024 · 4 Apr 2024 · Shift 2
    
    1. A.${\text{H}}_2\text{O},{\text{H}}^{+}$ and ${\text{NaOH}}_{(\text{alc})}/{\text{I}}_2$
    2. B.${\text{O}}_3,\text{Zn}/{\text{H}}_2\text{O}$ and ${\text{KMnO}}_4$
    3. C.${\text{H}}_2\text{O},{\text{H}}^{+}$ and ${\text{KMnO}}_4$
    4. D.${\text{O}}_3,\text{Zn}/{\text{H}}_2\text{O}$ and ${\text{NaOH}}_{(\text{alc})}/{\text{I}}_2$
    Show answer

    Answer: D

22. Q892024 · 4 Apr 2024 · Shift 2· Numerical answer

    Phthalimide is made to undergo following sequence of reactions. $\text{Phthalimide}\underset{\text{(ii) Benzylchloride}}{\overset{\text{(i) KOH}}{\to }}\text{‘P’}$ Total number of $\pi$ bonds present in product 'P' is/are _________.

    Show answer

    Answer: 8

23. Q632024 · 1 Feb 2024 · Shift 1

    Identify $A$ and $B$ in the following sequence of reaction $${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}{\mathrm{H}}_3\stackrel{\mathrm{C}{\mathrm{l}}_2/h\nu }{\to }\mathrm{A}\underset{373\mathrm{K}}{\overset{{\mathrm{H}}_2\mathrm{O}}{\to }}\mathrm{B}$$

    1. A.$\mathrm{A}={\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHC}{\mathrm{l}}_2$, $\mathrm{B}={\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COOH}$
    2. B.$\mathrm{A}={\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHC}{\mathrm{l}}_2$, $\mathrm{B}={\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}$
    3. C.$\mathrm{A}={\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COCl}$, $\mathrm{B}={\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}$
    4. D.$\mathrm{A}={\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}{\mathrm{H}}_2\mathrm{Cl}$, $\mathrm{B}={\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}$
    Show answer

    Answer: B

24. Q792024 · 1 Feb 2024 · Shift 1

    Match List - I with List - II. $$\begin{array}{ll}\text{List I (Reactions)}& \text{List II (Reagents)}\\ \text{(A) }\mathrm{C}{\mathrm{H}}_3(\mathrm{C}{\mathrm{H}}_2{)}_5-\mathrm{C}(=\mathrm{O})-\mathrm{O}{\mathrm{C}}_2{\mathrm{H}}_5⟶\mathrm{C}{\mathrm{H}}_3(\mathrm{C}{\mathrm{H}}_2{)}_5\mathrm{CHO}& \text{(I) }\mathrm{C}{\mathrm{H}}_3\mathrm{MgBr},{\mathrm{H}}_2\mathrm{O}\\ \text{(B) }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CO}{\mathrm{C}}_6{\mathrm{H}}_5⟶{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}{\mathrm{H}}_2{\mathrm{C}}_6{\mathrm{H}}_5& \text{(II) Zn(Hg) and conc. HCl}\\ \text{(C) }{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CHO}⟶{\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CH}(\mathrm{OH})\mathrm{C}{\mathrm{H}}_3& \text{(III) }\mathrm{NaB}{\mathrm{H}}_4,{\mathrm{H}}^{+}\\ \text{(D) }\mathrm{C}{\mathrm{H}}_3\mathrm{COC}{\mathrm{H}}_2\mathrm{COO}{\mathrm{C}}_2{\mathrm{H}}_5⟶\mathrm{C}{\mathrm{H}}_3\mathrm{C}(\mathrm{OH})(\mathrm{H})\mathrm{C}{\mathrm{H}}_2\mathrm{COO}{\mathrm{C}}_2{\mathrm{H}}_5& \text{(IV) DIBAL-H, }{\mathrm{H}}_2\mathrm{O}\end{array}$$ Choose the correct answer from the options given below :

    1. A.(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
    2. B.(A)-(IV), (B)-(II), (C)-(III), (D)-(I)
    3. C.(A)-(IV), (B)-(II), (C)-(I), (D)-(III)
    4. D.(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
    Show answer

    Answer: C

25. Q852024 · 1 Feb 2024 · Shift 1· Numerical answer

    Consider the following reaction : $$3\mathrm{PbC}{\mathrm{l}}_2+2(\mathrm{N}{\mathrm{H}}_4{)}_3\mathrm{P}{\mathrm{O}}_4\to \mathrm{P}{\mathrm{b}}_3(\mathrm{P}{\mathrm{O}}_4{)}_2+6\mathrm{N}{\mathrm{H}}_4\mathrm{Cl}$$ If $72\text{ mmol}$ of $\mathrm{PbC}{\mathrm{l}}_2$ is mixed with $50\text{ mmol}$ of $(\mathrm{N}{\mathrm{H}}_4{)}_3\mathrm{P}{\mathrm{O}}_4$, then the amount of $\mathrm{P}{\mathrm{b}}_3(\mathrm{P}{\mathrm{O}}_4{)}_2$ formed is ________ $\text{mmol}$ (nearest integer).

    Show answer

    Answer: 24