Question:
Which from following polymers contains $-\text{CO}-\text{NH}-$ linkage?
Which from following polymers contains $-\text{CO}-\text{NH}-$ linkage?
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Polyamides and Urea-based resins contain the amide linkage.
Updated On: Apr 26, 2026
- Glyptal
- Thermocol
- Buna-N
- Urea-formaldehyde resin
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The Correct Option is D
Solution and Explanation
Step 1: Linkage Identification
The $-\text{CO}-\text{NH}-$ linkage is known as an amide (or peptide) linkage.
Step 2: Analysis
- (A) Glyptal is a polyester. - (B) Thermocol (Polystyrene) is an addition polymer of styrene. - (C) Buna-N is a copolymer of butadiene and acrylonitrile. - (D) Urea-formaldehyde resin is formed from Urea ($NH_2-CO-NH_2$) and Formaldehyde, maintaining the amide bond structure.
Final Answer: (D)
The $-\text{CO}-\text{NH}-$ linkage is known as an amide (or peptide) linkage.
Step 2: Analysis
- (A) Glyptal is a polyester. - (B) Thermocol (Polystyrene) is an addition polymer of styrene. - (C) Buna-N is a copolymer of butadiene and acrylonitrile. - (D) Urea-formaldehyde resin is formed from Urea ($NH_2-CO-NH_2$) and Formaldehyde, maintaining the amide bond structure.
Final Answer: (D)
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