Which from following polymers contain - $\mathrm{CO}-\mathrm{NH}-$ linkage in it?.

Which from following polymers contain - $\mathrm{CO}-\mathrm{NH}-$ linkage in it?.
  1. Urea formaldehyde resin
  2. Glyptal
  3. Polycarbonate
  4. Thermacol

Asked in: MHT CET 2024 (11 May Shift 2)

Practice more Introduction to Polymer Chemistry questions on Aicharya