(a) mgh (b) 4/5 mgh (c) 5/6 mgh (d) 6/7 mgh Answer: c (12)
(a) Cylinder (b) Hollow sphere (c) Solid cylinder (d) Ring Ans. b (12)
(a) 2/5 (b) 2/7 (c) 3/5 (d) 3/7 Ans. b (3)
(a) K/x (b) K/2x (c) K/x2 (d) K/2×2 Answer: d (4)
(i) Slides without rotating (ii) Rolls without slipping, with the same speed. The ratio of kinetic energy in the two cases is (a) 1 : 1 (b) 4 : 1 (c) 1 : 2 (d) 2 : 1 Ans. c …
(a) 2/9 (b) 2/7 (c) 2/5 (d) 7/2 Ans. c (8)
(a) The gravitational field is necessarily zero (b) The gravitational field is not necessarily zero (c) Nothing can be said definitely about the gravitational field (d) None of these Answer: a (22)
a. They contain covalent bonds between various linear polymer chains b. They are formed from bi- and tri – functional monomers c. Examples are bakelite ad melamine d. They contain strong covalent bonds in their polymer chains Ans. d (10)
(a) ( 1/4 ) ω2R (b) (3/4)ω2R (c) ω2R (d) (1/2 …
(a) 0.014 J (b) 0.028 J (c) 280 J (d) 140 J Ans. a (42)
a. cis- polyisoprene b. Cellulose nitrate c. Cellulose acetate d. Vulcanised rubber Ans. a (5)
a. Silk b. Dacron c. Nylon – 66 d. All of these Ans. d (10)
a. Amylopectin b. Glycogen c. Starch d. Amylose Ans. d (6)
(a) GM/R2 (b) m0 (c) mM (d) 1/R3/2 …
a. Polythene b. Nylon – 6 c. Teflon d. Nylon -6, 6 Ans. d (8)
a. Thermoplastic b. Thermosetting plastic c. Both d. None Ans. b (6)
(a) 45 kg (b) 202.5 kg (c) 90 kg (d) 40 kg Answer: d (4)
a. Natural polymer b. Semisynthetic polymer c. Synthetic polymer d. Plasticiser Ans. b (3)
a. Thermoplastic b. Thermosetting plastic c. Elastic (rubber) d. Resin Ans. c (8)
(a) 1 : 2 (b) 2 : 1 (c) 3 : 5 (d) 5 : 3 Answer: b (7)
a. Melamine b. Glyptal c. Dacron d. Neoprene Ans. d (9)
a. Formaldehyde → meta- formaldehyde b. Acetaldehyde → para-aldehyde c. Acetone→ mesityl oxide d. Ethene → polyethene Ans. c (8)
(a) R2/M (b) M/R2 (c) MR2 (d) MR Answer: b (3)
a. Polythese b. PVC c. Orlon d. Terylene Ans. d (7)
a. Nylon 66 b. Nylon 6 c. Dacron d. Buna – S Ans. d (17)
(a) 4.2 ×106 m (b) 3.19 × 106 m (c) 1.59 ×106m …
a. Terylene b. Polypropylene c. Polyethylene d. Polystyrene Ans. a (9)
a. Starch and Nylon b. Starch and Cellulose c. Proteins and Nylon d. Proteins and PVC Ans. b (9)
a. Dacron b. Neoprene c. Teflon d. Acrylonitrile Ans. a (7)
a. Step-growth polymer b. Synthetic fibre c. Condensation polymer d. It is also called decron e. Thermosetting plastic Ans. e (6)
⌈NH (CH 2 ) NHCO (CH 2 ) 4 CO ⌉ n is a a. Thermosetting polymer b. Homopolymer c. Copolyer d. Addition polymer Ans. c (11)
a. Protein b. PVC c. Polythene d. Rubber Ans. a (11)
a. Polyethylene b. PVC c. Nylon d. Cellophane Ans. d (7)
(a) 0.2 g (b) 0.4 g (c) 2 g (d) 4 g Answer: a (7)
(a) 125 N (b) 250 N (c) 500 N (d) 1000 N Answer: b (5)
(a) 1/800 rad/s (b) 1/400 rad/s (c) 1/600 rad/s …