Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE MainChemistryGeneral Organic Chemistry

Consider the following compounds: (A) CH ₃- CO - CH ₂- CO - CH ₃ (B) CH ₃- CO - CH ₂- COOC ₂ H ₅ (C) C ₂ H ₅ OOC - CH ₂- COOC ₂ H ₅ (D) CH ₃- CO - CH ₃ The correct decreasing order of p K_a values for the most acidic protons in these compounds is:

Options

  1. AA > B > C > D
  2. BD > A > B > C
  3. CD > C > B > A
  4. DD > B > C > A

Correct answer

C. D > C > B > A

Step-by-step solution

The p K_a value of an acid is inversely proportional to its acidic strength. A weaker acid has a higher p K_a value. The acidity of the given compounds depends on the stability of the carbanion formed after the removal of the most acidic proton. The stability of the carbanion is determined by the electron-withdrawing ability of the adjacent groups. Compound (D) has only one carbonyl group, making its carbanion the least stable and the compound the least acidic (highest p K_a ). Compounds (A), (B), and (C) have acti

Practice General Organic Chemistry on Quantrex Academy →

More from General Organic Chemistry

Given below are two statements: Statement I: Vapours of the liquid with higher boiling point condense before vapours of the liquid with lower boiling points in fractional distillat 2026The total number of aromatic compounds/species from the following is 2026Given below are two statements : Statement I : A mixture of C₁₂ H₂₂ O₁₁ (sugar) and NaCl can be separated by dissolving sugar in alcohol, due to differential solubility. Statement 2026Shown below is the structure of methyl acetate with three different , and carbon - oxygen bonds. The correct order of bond lengths of these bonds is : 2026Given below are two statements: Statement I: 2,6 -diethylcyclohexanone and 6 -methyl- 2 -n-propylcyclohexanone are metamers. Statement II: 2,2,6,6 -tetramethylcyclohexanone exhibit 2026Match List-I with List-II. List-I (Purification technique) List-II (Used to separate) A. Simple distillation I. Steam volatile compound B. Fractional distillation II. Two liquids w 2026Identify the correct IUPAC name of hydrocarbon ( x ) containing three primary carbon atoms and with molar mass 72 g mol ⁻¹ . 2026Given below are two statements: Statement I: On the basis of inductive effect, the order of stability of alkyl carbanions is CH ₃^-> CH₃ -CH₂^- > ( CH₃ )₂ CH ^- > ( CH₃ )₃ C ^- . S 2026 Full General Organic Chemistry list All JEE Main PYQs