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JEE Main202623 January 2026Evening ShiftChemistryAldehydes and KetonesActual

Iodoform test can differentiate between A. Methanol and Ethanol B. CH ₃ COOH and CH ₃ CH ₂ COOH C. Cyclohexene and cyclohexanone D. Diethyl ether and Pentan-3-one E. Anisole and acetone Choose the correct answer from the options given below:

Options

  1. AB, C & E Only
  2. BA & D Only
  3. CA & E Only
  4. DA, B & E Only

Correct answer

C. A & E Only

Step-by-step solution

The iodoform test is given by compounds containing the methyl ketone group ( CH₃CO- ) or alcohols that can be oxidized to methyl ketones ( CH₃CH(OH)- ). A. Methanol ( CH₃OH ) does not give the test, while Ethanol ( CH₃CH₂OH ) gives a positive iodoform test because it contains the CH₃CH(OH)- group. Thus, they can be differentiated. B. Acetic acid ( CH₃COOH ) and Propanoic acid ( CH₃CH₂COOH ) both do not give the iodoform test. Carboxylic acids generally do not respond to this test. Thus, they cannot be differentiate

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