Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2024Evening ShiftChemistryAldehydes and KetonesActual

Given are the names of 4 compounds. Two of these compounds will not undergo Cannizzaro's reaction. Identify the two. A. 2-Chlorobutanal B. 2,2-Dimethylpropanal C. Benzaldehyde D. 2-Phenyl ethanol

Options

  1. AD & C
  2. BA & D
  3. CA & B
  4. DC & B

Correct answer

B. A & D

Step-by-step solution

Cannizzaro reaction is a disproportionation reaction given by aldehydes that do not possess any -hydrogen atom. In the presence of a strong base, these aldehydes undergo self-oxidation and reduction to form a carboxylic acid salt and an alcohol. Analyzing the given compounds: A. 2-Chlorobutanal: The structure is CH₃-CH₂-CHCl-CHO . The carbon atom adjacent to the carbonyl group (the -carbon) has one hydrogen atom attached. Since it has an -hydrogen, it will undergo aldol condensation, not Cannizzaro reaction. B. 2,2

Practice Aldehydes and Ketones on Quantrex Academy →

More from Aldehydes and Ketones

Which one of the following is the correct statement? 2026Match the reactions in List I with the final products formed as given in List II. List I List II W C ₆ H ₅ CH ₃ (i) CrO ₃ + ( CH ₃ CO )₂ O ; (ii) H ₂ O + heat P R ₂ CO X RCOOC ₂ H 2026Identify products [P₁ ] and [P₂ ] formed when Benzonitrile undergoes the following reactions. 2026Which of the following is NOT TRUE about nucleophilic addition reactions of aldehydes? 2026Propanal on reaction with dilute NaOH, undergoes aldol condensation resulting in the formation of a compound A. Identify the correct structure of A and name of the compound. 2026Etard reaction is a method of preparation of benzaldehyde by oxidation of toluene. The oxidizing agent used in this reaction is: 2026What are X and P in the following reaction sequence? 2026C ₃ H ₆ (i) BH ₃; (ii) H ₂ O ₂/ NaOH P CrO ₃, anhydrous medium Q (i) CH ₃ MgBr ; (ii) H ₂ O R + Mg(OH)Br The organic compounds P, Q and R are 2026 Full Aldehydes and Ketones list All COMEDK PYQs