Problem 34 - A Complete Resource Book in Chemistry for JEE Main

Question

Monomer of trioxane is (a) formaldehyde (b) acetone (c) isoprene (d) acetaldehyde

Step-by-Step Solution

Answer

The monomer of trioxane is formaldehyde.

Step 1: Understanding the Question

We need to identify the monomer of trioxane. A monomer is a small molecule that can join with others to form a polymer. Trioxane is a form of cyclic trimer derived from formaldehyde.

Step 2: Reviewing the Options

We are given four options: (a) formaldehyde, (b) acetone, (c) isoprene, and (d) acetaldehyde. We know that trioxane is connected to formaldehyde, a chemical compound with the formula CH2O.

Step 3: Analyzing Formaldehyde

Formaldehyde is a simple aldehyde with the chemical formula HCHO. It is commonly used in the formation of resins and other chemical compounds, including trioxane.

Step 4: Conclusion Based on Chemical Knowledge

Since trioxane is a polymeric form of formaldehyde, it logically follows that the monomer must be formaldehyde.

Key Concepts

Trioxane: Understanding Its Structure and Derivation

Trioxane is an interesting chemical compound with fascinating properties and applications. It is classified as a cyclic trimer, which means it is formed by three formaldehyde molecules linked together in a ring. This cyclic structure is essential for its stability and unique characteristics. Trioxane is derived specifically from the polymerization of formaldehyde. Its chemical structure allows it to be used in various industries, particularly in the chemical manufacturing of plastics and resins. When we say that trioxane is a cyclic trimer, we are emphasizing its origin from three similar monomer units, which in this case are formaldehyde molecules linked in a cyclic form. This significant characteristic defines much of its chemical behavior and applications.

Formaldehyde: The Building Block of Trioxane

Formaldehyde, a simple yet vital chemical compound, serves as the monomer unit for trioxane. Its chemical formula, HCHO, represents its composition of hydrogen, carbon, and oxygen. As a fundamental building block, formaldehyde is utilized extensively in industrial processes, especially as a precursor in the formation of various polymers, including trioxane.

• Formaldehyde is known for its strong reducing properties, making it a key player in synthetic reactions.
• It is found naturally in small quantities due to metabolic processes, although it is more known for its industrial applications.
• Another common use of formaldehyde is in the production of resins, which are crucial in manufacturing composite wood products.

Understanding formaldehyde's role as a monomer is crucial for comprehending how compounds like trioxane are synthesized and utilized.

Cyclic Trimer: A Unique Molecular Formation

A cyclic trimer is a type of polymer that is formed when three identical monomer units join together in a ring structure, creating a stable and often unique compound. In the case of trioxane, the monomers are formaldehyde molecules. This cyclic formation results in distinctive properties that are not present in the linear or branched counterparts of polymers. When forming cyclic trimers, three key reactions and structures emerge:

• Increased stability due to internal bonding of the ring structure.
• Unique chemical and physical properties which can include altered melting points and solubility relative to non-cyclic forms.
• The presence of only a limited number of functional groups due to the cyclic nature, often influencing reactivity and usage.

Understanding cyclic trimer formation gives insight into the complex world of polymer chemistry and the specific context of trioxane's synthesis from formaldehyde.