a. In vulcanization the rubber becomes harder and stronger b. Natural rubber has ‘trans’ configuration at every double bond c. Buna- S is a co-polymer of butene and styrene d. Natural rubber is 1, 4- polymer of isoprene Ans. b …
(a) mgR/2 (b) 2 mgR (c) mgR (d) mgR/4 Answer: c (4)
a. Polystyrene b. Nylon c. Polyethylene d. styrene butadiene resin Ans. d (9)
(a) 1 : 2 (b) 1 : 3 (c) 2 : 3 (d) 1 : 1 Ans. b (4)
(a) GMm/ 12R2 (b) GMm/ 3R2 (c) GMm / 8R (d) GMm / 6R Answer: d (6)
a. Teflon b. Nylon-66 c. Terylene d. Bakelite Ans. b (5)
(a) Solid sphere will reach the bottom first (b) Hollow spherical shell will reach the bottom first (c) Both will reach at the same time (d) None of these Ans. a (34)
a. Nylon b. Polyvinyl chloride c. Cellulose d. Natural rubber Ans. d (5)
(a) 0.062 J (b) 0.031 J (c) 0.015 J (d) 0.057 J Ans. b (31)
a. Vander Waals b. Hydrogen bonding c. Dipole-dipole interaction d. None of these Ans. b (45)
(a) Solid sphere (b) hollow sphere (c) Ring (d) All same Ans. d (23)
a. Terephthalic acid and ethylene glycol b. Benzoic acid and para HO – (C 6 H 4 ) – OH c. Propylene and para HO – (C 6 H 4 ) – OH d. Benzoic acid and ethanol Ans. a (10)
(a) 2/3 mgR (b) 3/4 mgR (c) mgR/2 (d) mgR/4 Answer: b (5)
a. An addition polymer with a benzene ring in every repeating unit b. a condensation polymer with a benzene ring in every repeating unit c. An addition polymer with two carbon atoms in every repeating unit d. a condensation polymer …
a. D- fructose b. D- ribose c. D – glucose d. L – glucose Ans. c (7)
a. A thermoplastic material obtained from caprolactam and urea b. A thermoplastic material obtained from nitrate and camphor c. A thermoplastic material obtained from urea and formaldehyde d. A thermoplastic material obtained from glycerol and phthalic anhydride Ans. b …
(a) – 5000 J (b) – 1000 J (c) – 2400 J (d) 5000 J Answer: A (5)
(a) -2 mgR e (b) 2 mgR e (c) 1/2 mgR e (d) -(1/2) mgR e Answer: d (4)
a. Phenol b. Glycol c. Glycerol d. Formaldehyde Ans.b (11)
(a) Gm/R2 (b) g (c) Zero (d) None of these Answer: c (10)
a. Natural rubber b. Teflon c. Nylon – 66 d. Polystyrene Ans. c (9)
(a) 1/9 m (b) 1/10 m (c) 1/11 m (d) 10/11 m Answer: c (5)
a. β – D – glucose b. α – D – glucose c. Fructose d. Rhamnose Ans. b (6)
a. Nil b. Weak c. Strong d. Very strong Ans. b (8)
(a) 2R (b) 3R (c) 4R (d) 5R Answer: c (11)
a. Polythene b. Polyester c. Polysaccharide d. Polyamide Ans. d (8)
(a) √GM/2R (b) GM/R (c) 2√GM/R (d) GM/2R Answer: b (4)
a. Decron b. Orlon (acrilan) c. PVC d. Bakelite Ans. b (6)
a. Artificial silk is derived from cellulose b. Nylon – 66 is an example of elastomer c. The repeat unit in natural rubber is isoprene d. Both starch and cellulose are polymers of glucose Ans. b (6)
a. Si – O – Si linkage b. O – Si – O linkage c. Si – C – linkage d. Si – S – O linkage Ans. a (8)
a. Bakelite b. Polythene c. polystyrene d. PVC Ans. a (15)
a. CH3 CH 2 CI b. CH 3 CH2 OH c. C 6 H 6 d. C 3 H 6 Ans. d (34)