Haloalkanes & Haloarenes · JEE Main previous year questions

2024 5 questions

1. Q672024 · 8 Apr 2024 · Shift 1
   
   1. A.
   2. B.
   3. C.
   4. D.
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   Answer: C

2. Q752024 · 8 Apr 2024 · Shift 2

   Given below are two statements : Statement (I) : ${\mathrm{S}}_{\mathrm{N}}2$ reactions are 'stereospecific', indicating that they result in the formation of only one stereo-isomer as the product. Statement (II) : ${\mathrm{S}}_{\mathrm{N}}1$ reactions generally result in formation of product as racemic mixtures. In the light of the above statements, choose the correct answer from the options given below :

   1. A.Both Statement I and Statement II are false
   2. B.Statement I is false but Statement II is true
   3. C.Statement I is true but Statement II is false
   4. D.Both Statement I and Statement II are true
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   Answer: D

3. Q672024 · 1 Feb 2024 · Shift 2

   Match List - I with List - II. | List I (Compound) | List II (Use) | | :--- | :--- | | (A) Carbon tetrachloride | (I) Paint remover | | (B) Methylene chloride | (II) Refrigerators and air conditioners | | (C) DDT | (III) Fire extinguisher | | (D) Freons | (IV) Non Biodegradable insecticide | Choose the correct answer from the options given below :

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

4. Q802024 · 29 Jan 2024 · Shift 2

   Alkyl halide is converted into alkyl isocyanide by reaction with

   1. A.$\mathrm{KCN}$
   2. B.$\mathrm{N}{\mathrm{H}}_4\mathrm{CN}$
   3. C.$\mathrm{NaCN}$
   4. D.$\mathrm{AgCN}$
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   Answer: D

5. Q792024 · 27 Jan 2024 · Shift 1

   The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ;

   1. A.Retention occurs in $S_{N}1$ reaction and inversion occurs in $S_{N}2$ reaction.
   2. B.Racemisation occurs in $S_{N}1$ reaction and retention occurs in $S_{N}2$ reaction.
   3. C.Racemisation occurs in both $S_{N}1$ and $S_{N}2$ reactions.
   4. D.Racemisation occurs in $S_{N}1$ reaction and inversion occurs in $S_{N}2$ reaction.
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   Answer: D