61. Which of the following is not the commercial name of polymethylmethacrylate (PMMA) ? September 7, 2025 by Admin Perspex Lucite Plexiglass Teflon ✅ The correct answer is option D.
62. Main constituent of natural rubber is September 7, 2025 by Admin polystyrene polyisoprene polybutadiene poly chloroprene ✅ The correct answer is option B.
63. Density of low density polythene is about __________ gm/c.c. September 7, 2025 by Admin 0.38 0.56 0.81 0.91 ✅ The correct answer is option D.
64. Which of the following is generally not drawn into fibre ? September 7, 2025 by Admin Polyamide Unsaturated polyesters Saturated polyesters Polyacrylonitrile ✅ The correct answer is option B.
65. Unbreakable crockeries are made from __________ polymers. September 7, 2025 by Admin polystyrene melamine polystyrene polyurathane ✅ The correct answer is option B.
66. Terylene is September 7, 2025 by Admin same as dacron a polyester both(a) & (b) neither (a) nor (b) ✅ The correct answer is option C.
67. Phthalic anhydride is used September 7, 2025 by Admin in making PVC as plasticisers in insecticides manufacture for making nylon-6 ✅ The correct answer is option B.
68. Polymers are September 7, 2025 by Admin micromolecules macromolecules sub-micromolecules none of these ✅ The correct answer is option B.
69. Nylon 6, 10 which is used for bristles making is superior to nylon 6, 6 due to its lower water absorption capacity, is a/an September 7, 2025 by Admin polyester polyamide polyisoprene polystyrene ✅ The correct answer is option B.
70. Polycaprolactum is also known as September 7, 2025 by Admin nylon-66 nylon-6 teflon SBR ✅ The correct answer is option B.