PPSC Chemistry Part II Organic Chemistry Online Test With Answers

PPSC Chemistry Part II Organic Chemistry Online Test

Sr. # Questions Answers Choice
1 Casionic polymerization is initiated by BF3 NaNH2 Bul Both b and c
2 In which polymerization branching of chain cannot be possible. Free radical Cationic Anionic Anionic and Zieglar Natta
3 In propagation step the reaction intermediate of radical polymerization is Carbocation Carbonion Free radical Carbene
4 Which of the following compounds cannot be a monomer. CH3-CHOOH -CH2OH NH2 -CH2-NH2 CH3-CH2-NH3 NH2-CH2-CH-CH2 -NH2<div><br></div><div> CH3</div>
5 Polyamide jinkage is present in Nylon Silk Protein All of these
6 Which of the following is branch chain polymer. Glycogen Terylene PVC Orlen
7 Which type of polymers the Vulcanised rubbers is. Linear Cross jinked Branch chain Any one of these
8 Which of the following linear polymer. Polypeptide Protein Starch Phenol formaldehyde resin
9 Which of the following statements are correct for Linear polymers. Linear polymers may be condensation as well as addition polymers Structure is well packed in nature Linear polymers have higher density higher melting point and higher tensile strength All are correct
10 Which type of polymer the Nylon -06 is Polyamide Polyester Addition Homopolymer
11 Which of the following is homopolymer. Starch Plexiglas Orlon All of these
12 Monomer of Nylon -6 is Adipic acid Hexamethylenediamine Caprolactam All of these
13 Which of the following is not a biodegradable polymer. Protein PVC Cellulose Nucleic acid
14 Which one of the following is natural polymer. Starch Nylon-6 Neoprene Buna-S, SBR
15 Glycerol on dehyeration gives Allyl alcohol Aerolein CHOH = C= CHOH -CHO -CHOH -CH2OH
16 Rectified spirit obtained by formentation contains 5% of water .So in order to remove it, rectified spirit is mixed with suitable quantity of benzene and heated Benzene helps because. It is dehydreating agent and so removes water It forms the loweer layer which retains all the water so that alcohol can be distilled off It form an azeotropic mixture having high boiling point and thus allows the alcohol to distall over It forms low boiling azeotropic mixture which distille over leaving behind pure alcohol which can than be distilled.
17 Treatment of phenol with cold dilute nitric acid gives. Only o-nitro phenol Only p-nitro phenol 2,4,6 -Teinitro phenol Mixture of o-and p-nitro phenol
18 Each of the following when present at para position decreases the acidic strength of phenol except. -NH2 -Cl CH3O- CH3-
19 Phenol on reaction with ethanoic anhydrides in the presence of sodium ethanoate gives. Phenyl benzoate Ethyl benzoate Phenyl ethanoate Phenyl methyl ether
20 Which of the following statements regarding phenols is not correct. Phenol ls are stronger acids than water and alcohols. Phenol are weaker acids than carboxylic acids Phenol are solubel in both aqueous NaOH and aqueous sodium hydrogen carbonate Phenoxides ions are more stable than the corresponding phenol
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