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MHT CET Medical202621 April 2026Evening ShiftChemistryAldehydes and KetonesActual

What is metaldehyde?

Options

  1. ATetramer of acetaldehyde.
  2. BDimer of acetaldehyde.
  3. CTrimer of acetaldehyde.
  4. DTrimer of formaldehyde.

Correct answer

A. Tetramer of acetaldehyde.

Step-by-step solution

Metaldehyde is a cyclic tetramer of acetaldehyde. It is formed when acetaldehyde is treated with a few drops of concentrated sulfuric acid or dry hydrogen chloride gas at a low temperature (below 0^ C ). Paraldehyde is the trimer of acetaldehyde, which is formed at room temperature. Therefore, metaldehyde is the tetramer of acetaldehyde. Answer: Tetramer of acetaldehyde.

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