OBJECTIVE QUESTIONS FOR NEET AIIMS JIPMER WWW WISEDANE

OBJECTIVE QUESTIONS FOR NEET AIIMS JIPMER WWW. WISEDANE. COM

CHEMISTRY POLYMERS MCQ’S

Q 1. The turbidity of a polymer solution measures A. The light scattered by a solution B. The light absorbed by a solution C. The light transmitted by a solution D. None of the above

CORRECT ANSWER (A) EXPLANATI ON v Polymer molecules being big. Scattered light

Q 2. Which of the following is not a semi-synthetic polymer? A. Cis-polyisoprene B. Cellulosenitrate C. Cellulose acetate D. Vulcanized rubber CORRECT ANSWER (A)

EXPLANATION v Cis-Polyisoprene is a natural polymer.

Q 3. Polymer formation from monomer starts by A. Condensation reaction between monomers B. Coordination reaction between monomers C. Conversion of monomer to monomer ions by protons D. Hydrolysis of monomers CORRECT ANSWER (A)

EXPLANATION v Polymers are obtained by the condensation reaction between monomers.

Q 4. Polymer obtained by condensation polymerization is A. Polythene B. Teflon C. phenol-formaldehyde D. nitrile rubber CORRECT ANSWER (C)

EXPLANATION v Phenol-formaldehyde polymer is obtained by condensation polymerization

Q 5. Which is an example of thermosetting polymer? A. Polythene B. PVC C. Neoprene D. Bakelite CORRECT ANSWER (D)

EXPLANATION v Bakelite is a thermosetting polymer

Q 6. Which of the following sets contains only addition polymers? A. Polyethylene, polypropylene, terylene B. Polyethylene, PVC, acrilon C. Buna-S, nylon, polybutadiene D. Bakelite, PVC, polyethylene CORRECT ANSWER (B)

EXPLANATION v Polyethylene, PVC, acrilon are the examples of addition polymers.

Q 7. Synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile and is called A. PVC B. Polyacrylonitrile C. Cellulose D. Dynel CORRECT ANSWER (D)

EXPLANATION v Dynel is a copolymer of vinyl chloride and acrylonitrile.

Q 8. Which of the following contains isoprene units? A. Natural rubber B. Nylon-66 C. Polyethylene D. Dacron CORRECT ANSWER (A)

EXPLANATION

Q 9. Terylene is a condensation polymer of ethylene glycol and A. Benzoic Acid B. Phthalic Acid C. Salicylic Acid D. Terephthalic Acid CORRECT ANSWER (D)

EXPLANATION

Q 10. Soft drink bottles and baby feeding bottles are generally made up of A. Polyester B. Polyurea C. Polyamide D. Polystyrene CORRECT ANSWER (D)

EXPLANATION v. Polystyrene is used for making soft drink bottles and baby feeding bottles.

Q 11. Polymer used in bullet proof glass is A. PMMA B. Lexan C. Nomex D. Kevlar CORRECT ANSWER (B)

EXPLANATION v Lexan is used for making bullet proof glass.

Q 12. Which of the following is used in paints? A. Terylene B. Nylon C. Glyptal D. Chloroprene CORRECT ANSWER (C)

EXPLANATION v Glyptal is used in paints and lacquers.

Q 13. Which of the following monomers gives the polymer neoprene on polymerization? A. CH 2 = CHCl B. CCl 1 = CCl 2 C. CH 2 = CCl—CH =CH 2 D. CF 2 = CF 2 CORRECT ANSWER (C)

EXPLANATION v. Chloroprene (CH 2=CCl—CH =CH 2) is the monomer of neoprene

Q 14. Which of the following is currently used as a tyre cord? A. Nylon-6 B. Polyethylene C. Polypropylene D. Bakelite CORRECT ANSWER (A)

EXPLANATION v Nylon-6 is currently used as a tyre cord

Q 15. Bakelite is obtained from phenol by reacting it with A. Acetaldehyde B. Acetal C. Formaldehyde D. chlorobenzene CORRECT ANSWER (C)

EXPLANATION v Bakelite is a condensation network polymer of phenol (C 6 H 5 OH) and formaldehyde (HCHO).

Q 16. Ebonite is A. Natural Rubber B. Synthetic Rubber C. Highly Vulcanized Rubber D. Polypropene CORRECT ANSWER (C)

EXPLANATION v. Ebonite is a hard, highly vulcanized rubber.

Q 17. An example of biopolymer is A. Teflon B. Neoprene C. Nylon-66 D. DNA CORRECT ANSWER (D)

EXPLANATION v. An example of biopolymer is DNA

Q 18. The catalyst used for the polymerization of olefins is A. Ziegler-Natta catalyst B. Wilkinson’s catalyst C. Pd-catalyst D. Zeolite CORRECT ANSWER (A)

EXPLANATION v. Ziegler-Natta catalyst is used for the polymerization of olefins.

Q 19. Which one of the following can be used as a monomer in a polymerization reaction? A. CH 3 CH 2 Cl B. CH 3 CH 2 OH C. C 6 H 6 D. C 3 H 6 CORRECT ANSWER (D)

EXPLANATION v. Only olefins (here C 3 H 6) and dienes undergo addition polymerization.

Q 20. The catalyst used in the manufacture of polyethylene by Ziegler method is A. Titanium tetrachloride and triphenylaluminium B. Titanium tetrachloride and triethylaluminium C. Titanium dioxide D. Titanium isopropoxide CORRECT ANSWER (B)

EXPLANATION v. Titanium tetrachloride + triethyl aluminium.

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