Polymer Materials – Melamine and Formaldehyde Facts (Choose the Incorrect Statement) Which one of the following statements regarding melamine, formaldehyde, and their resin is NOT correct?

Introduction:
Melamine-based thermosets are staple engineering plastics. The question probes factual understanding of feedstocks and resin formation pathways, asking you to spot the incorrect statement among otherwise correct facts.

Given Data / Assumptions:

• Melamine-formaldehyde (MF) is a thermosetting resin.
• Industrial organic chemistry links methane to methanol and then to formaldehyde.
• Electrical insulation and tableware are common MF applications due to heat resistance and hardness.

Concept / Approach:

Melamine is not produced from calcium carbide. Industrially, melamine is synthesized from urea (which originates from ammonia and carbon dioxide). Formaldehyde is produced by catalytic oxidation/dehydrogenation of methanol, and MF resins are formed by condensation of melamine with formaldehyde under controlled pH/temperature.

Step-by-Step Solution:

Verification / Alternative check:

Standard polymer chemistry texts and industrial process summaries confirm urea-based melamine production and methanol-to-formaldehyde routes.

Why Other Options Are Wrong:

(b) is acceptable phrasing of the industrial pathway; (c) and (d) are core facts; (e) cannot be true because (a) is false.

Common Pitfalls:

Confusing acetylene chemistry from calcium carbide with melamine production; equating “from methane” to a direct conversion rather than via methanol.

Final Answer:

Melamine is obtained from calcium carbide