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MHT CET 202621 AprilEvening Shift
Exam
MHT CET
Year
2026
Date
21 April
Shift
Evening Shift
Subject
Chemistry
Chapter
Aldehydes and Ketones

MHT CET 2026 · 21 April · Evening Shift · Chemistry · Aldehydes and Ketones

What is metaldehyde?

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∘C0^{{}^{\circ}}\text{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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