Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202620 April 2026Evening ShiftChemistryAldehydes and KetonesActual

Which of the following reactions is preferentially used to prepare the corresponding paraffins from alkanone?

Options

  1. AClemmensen reduction
  2. BEtard reaction
  3. CRosenmund reduction
  4. DHaloform reaction

Correct answer

A. Clemmensen reduction

Step-by-step solution

Alkanones (ketones) are reduced to the corresponding paraffins (alkanes) by Clemmensen reduction. In this reaction, the carbonyl group ( >C=O ) is converted into a methylene group ( >CH₂ ) using zinc amalgam ( Zn-Hg ) and concentrated hydrochloric acid ( HCl ). Etard reaction is used to oxidize toluene to benzaldehyde. Rosenmund reduction is used to convert acid chlorides into aldehydes. Haloform reaction is used to convert methyl ketones into a haloform and a carboxylic acid salt. Answer: Clemmensen reduction

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 MHT CET PYQs