PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Ziegler -Natta catalysta is (C2H3)3 Al TiCl4 (C2H5)3 Al/TiCl4 (C2H3)3 B/TiCl2
2 Which of the following type of polymerization is used for the preparation of synthetic rubber. Free radical Zingler natta Cationic Anionic
3 Casionic polymerization is initiated by BF3 NaNH2 Bul Both b and c
4 In which polymerization branching of chain cannot be possible. Free radical Cationic Anionic Anionic and Zieglar Natta
5 In propagation step the reaction intermediate of radical polymerization is Carbocation Carbonion Free radical Carbene
6 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>
7 Polyamide jinkage is present in Nylon Silk Protein All of these
8 Which of the following is branch chain polymer. Glycogen Terylene PVC Orlen
9 Which type of polymers the Vulcanised rubbers is. Linear Cross jinked Branch chain Any one of these
10 Which of the following linear polymer. Polypeptide Protein Starch Phenol formaldehyde resin
11 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
12 Which type of polymer the Nylon -06 is Polyamide Polyester Addition Homopolymer
13 Which of the following is homopolymer. Starch Plexiglas Orlon All of these
14 Monomer of Nylon -6 is Adipic acid Hexamethylenediamine Caprolactam All of these
15 Which of the following is not a biodegradable polymer. Protein PVC Cellulose Nucleic acid
16 Which one of the following is natural polymer. Starch Nylon-6 Neoprene Buna-S, SBR
17 Glycerol on dehyeration gives Allyl alcohol Aerolein CHOH = C= CHOH -CHO -CHOH -CH2OH
18 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.
19 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
20 Each of the following when present at para position decreases the acidic strength of phenol except. -NH2 -Cl CH3O- CH3-
21 Phenol on reaction with ethanoic anhydrides in the presence of sodium ethanoate gives. Phenyl benzoate Ethyl benzoate Phenyl ethanoate Phenyl methyl ether
22 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
23
An aromatic compound has a molecules formula C7H8O. How many isomers are possible for this compound.
 3 4 5 6
24 Which of the following reagent cannot be used to detect the phenolic group. Neutral FeCl3 I2/NaOH NaOH solution Br2/H2O
25 An organic liquid (X) containing C, H and H has a pleasent odour with a boiling point of 78 oC. On boiling X with conc. H2SO4 a colourless gas is produced which decolourless bromine water and alkaline KMnO4 One mole of this gas also takes one mole of H2. The organic liquid (X) is. n-C3H7OH iso-C3H7OH C2H5CHO CH3CH2OH
26 In which of the following group, each member given a positive iodoform test. Methanol, ethanol, propanone Ethanol, isopropyl alcohol, methanol Ethanol, ethanal, isopropyl alcohol Propanal 2-propanol, propanone
27 The reason why phenylamine is a much weaker base tahn ammonia when each is in aqueous solution to that. Teh ion pair of electron on two nitrogen atom of phenylamine is delocalised over the benzene ring. The phenylamine molecule is too large to capture hydrogen ion easily Phenylamine is much less soluble is water than is ammonia The benzene ring has a tendency to increase the acidity of its substituents.
28 Which of the following compounds would you use in order to obtain a crystalline derivative of an aromatic amine. 2,4 Dinitrophenyl hydrazine Nitrous acid Benzoyl chlride None of these
29 Carbylamine reaction proceeds via the intermediate formation of. Alkyl isocyanide Chloride ion Alkyl carbonion Dichloro methylene
30 The reagent which can be used to distinguish acetophenone from benzophenone is. 2,4 -dinito phenyl hydrazine Li AIH4 Benedict reagetn I2 and Na2CO3
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