Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK202510 May 2025Evening ShiftChemistryGeneral Organic ChemistryActual

Two statements, One Assertion and the other Reason, are given. Which one of the following is the correct option? Assertion: The acid strength of 4 compounds in the descending order is p-Nitrophenol > p-Methoxyphenol > Phenol > p- chlorophenol. Reason: Electron withdrawing groups increase the acid strength while Electron donating groups decrease the acid strength of Phenol and its derivatives.

Options

  1. ABoth Assertion and Reason are correct.
  2. BAssertion is correct but Reason is wrong.
  3. CAssertion is wrong but Reason is correct.
  4. DBoth Assertion and Reason are wrong.

Correct answer

C. Assertion is wrong but Reason is correct.

Step-by-step solution

The acid strength of substituted phenols depends on the electronic effects of the substituents. Electron withdrawing groups (EWG) stabilize the phenoxide ion through inductive (-I) and resonance (-M) effects, thereby increasing acidity. Electron donating groups (EDG) destabilize the phenoxide ion through inductive (+I) and resonance (+M) effects, thereby decreasing acidity. Comparing the substituents: 1. p-Nitrophenol: -NO₂ is a strong EWG ( -I and -M effects), making it the most acidic. 2. p-Chlorophenol: -Cl is a

Practice General Organic Chemistry on Quantrex Academy →

More from General Organic Chemistry

Which of the following is an INCORRECT statement? 2026Identify the aromatic compounds among the given set based on Huckel's rule: 2026Among the given resonating structures of molecules negative mesomeric effect is represented by: 2026Identify the correct structure of o-ethyl anisole. 2026Match the mixtures listed in Column I with the correct method used for their separation. Column I Column II A. Glycerol from spent Lye P. Steam distillation B. Mixture of Benzoic a 2026Which one of the following is not the correct IUPAC name of the compound? 2026Lassaigne's test for the detection of nitrogen fails in 2026Consider the sets I, II and III. Identify the set(s) which is (are) correctly matched. I. Staggered ethane > eclipsed ethane ......... torsional strain. II. 2, 2-Dimethylbutane > 2 2025 Full General Organic Chemistry list All COMEDK PYQs