Question

Melamine plastic crockery is a copolymer of:

• A. \( {HCHO} \) and melamine
• B. \( {HCHO} \) and ethylene
• C. Melamine and ethylene
• D. None of these

Hint:

Melamine-formaldehyde resin is a widely used thermosetting polymer known for its hardness and heat resistance, commonly used in kitchenware.

Answer 1

The Correct Option is A

Step 1: Understanding melamine plastic. Melamine plastic is a thermosetting polymer known for its high durability, heat resistance, and lightweight nature, commonly used in kitchenware and crockery. 
Step 2: Identifying the copolymer composition. Melamine-formaldehyde resin is formed by the polymerization of melamine and formaldehyde (HCHO). The reaction results in a cross-linked polymer network that gives melamine plastic its strong and heat-resistant properties: \[ {Melamine} + {Formaldehyde} \rightarrow {Melamine-Formaldehyde Resin} \] 
Step 3: Eliminating incorrect Option. 
- Option A: Correct, as melamine plastic is made from melamine and formaldehyde. 
- Option B: Incorrect, since ethylene is not involved in melamine plastic formation. 
- Option C: Incorrect, as ethylene does not participate in this polymerization. 
- Option D: Incorrect, since melamine plastic is a known polymer of melamine and formaldehyde. 
Hence, the correct answer is (A) \( {HCHO} \) and melamine.