Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Haloalkanes and Haloarenes question

2022 · 26 Jun · Shift 2 · Q10
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Haloalkanes and Haloarenes
  5. /2022 · 26 Jun · Shift 2 · Q10

Haloalkanes and Haloarenes question

2022 · 26 Jun · Shift 2 · Q10

JEE MainChemistryHaloalkanes and HaloarenesMCQ+4 / −1
Halogenation of which one of the following will yield m-substituted product with respect to methyl group as a major product?
  1. A
    JEE Main 2022 (Online) 26th June Evening Shift Chemistry - Haloalkanes and Haloarenes Question 73 English Option 1
  2. B
    JEE Main 2022 (Online) 26th June Evening Shift Chemistry - Haloalkanes and Haloarenes Question 73 English Option 2
  3. C
    JEE Main 2022 (Online) 26th June Evening Shift Chemistry - Haloalkanes and Haloarenes Question 73 English Option 3
  4. D
    JEE Main 2022 (Online) 26th June Evening Shift Chemistry - Haloalkanes and Haloarenes Question 73 English Option 4
View written solutionFree

Correct answer: C

  1. Key idea: directing effect in electrophilic aromatic substitution

    We need the compound whose halogenation gives the meta-substituted product with respect to the methyl group as the major product.

  2. Effect of substituents

    • A methyl group is ortho/para-directing.
    • To get substitution meta with respect to methyl, there must be another substituent already on the ring that is a strong meta-directing group, and its directing influence should dominate.
  3. Required situation

    If a benzene ring contains both:

    • a methyl group and
    • a strong electron-withdrawing meta-directing group such as −NO2-NO_2−NO2​, −CHO-CHO−CHO, −COOH-COOH−COOH, −COOR-COOR−COOR, −COR-COR−COR, etc.,

    then incoming halogen tends to enter at a position that is meta to the methyl group if that position is simultaneously favored by the stronger meta-directing substituent.

  4. Typical correct choice

    In standard JEE questions of this type, the correct structure is the one where a strong meta director is present along with the methyl group, such as methyl benzoic acid / nitrotoluene / similar ring where the available favored site becomes meta to methyl. Since the actual structures for options A, B, C, D are not displayed here, we infer from the stored answer and the directing-effect rule that option C must correspond to that structure.

  5. Conclusion

    Therefore, the compound in option C will give the meta-substituted product with respect to the methyl group as the major product on halogenation.


Note: The image/structures of options are missing in the text provided. So the choice is based on the directing-effect principle and the given stored key.

PreviousNext

More from Haloalkanes and Haloarenes

  • Major product 'B' of the following reaction sequence is : Includes diagram2022 · MCQ
  • The major product of the following reaction is : Includes diagram2022 · MCQ
  • The major product in the given reaction is Includes diagram2022 · MCQ
  • The major product (P) in the reaction is Includes diagram2022 · MCQ
  • Which one of the following compounds is inactive towards SN1 reaction?2022 · MCQ
  • The major product of the following reaction contains ​ bromine atom(s). Includes diagram2022 · Numerical
  • In the above reaction 'A' is Includes diagram2022 · MCQ
  • Considering the above reactions, the compound 'A' and compound 'B' respectively are : Includes diagram2022 · MCQ