Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Open MARKS Web Download App
Search any question & find its solution
Question: Answered & Verified by Expert
Order of acidity of benzoic acid (I), 4-methoxybenzoic acid (II), acetic acid (III) and 4-nitrobenzoic acid (IV) is
ChemistryGeneral Organic ChemistryAP EAMCETAP EAMCET 2018 (23 Apr Shift 2)
Options:
  • A IV $>$ I $>$ II $>$ III
  • B I $>$ II $>$ IV $>$ III
  • C III $>$ I $>$ II $>$ IV
  • D II $>$ I $>$ IV $>$ III
Solution:
1611 Upvotes Verified Answer
The correct answer is: IV $>$ I $>$ II $>$ III
An electron-donating group decreases the strength of acids, while electron withdrawing group increases the strength of acids. A methoxy group is clectron donating group, 4-methoxy benzoic acid is a weaker acid than benzoic acid. Nitro group is electron withdrawing group and will increase the strength of acids. Thus, correct order is
4-nitrobenzoic acid (IV) > benzoic acid (I) > 4-methoxy benzoic acid (II) > acetic acid (III)

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.

Use on iOS or Desktop Download from Google Play