PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 C is -2 butene on reaction with bromino give 2,3 -dibromobutane which is Recemic mixture Meso isomer Dextoroisomer Levoisomer
2 D(+) glyceraldebydes has the absolute configurtion. E- S- E- Z-
3 Which configuration has lowest potential energy. Eclipsed Staggered Skew All have same energy
4 Which of the following property has a higher value for trans isomer as compared to cis isomer. Density Dipole moment Melting point Boiling point
5 Stereotsomers not related to each other as object and minor image are called. Enantiomers Diastereolsomers Conformations Antipodes
6 Different arrangement of groups in space which can be converted into one another by rotation around a single bond are caled. Conformations Metameres Enatiomers All of the above
7 Which of the following is capable of shown g optical isomersm. CH3COCOOH CH3CHOHCOOH Botha a and b All of these
8 Which of the following molecules can oxhibit geometrical isomerism. CH3CH = CH2 CH3CH = CHCH3 (CH3)2 C = CH2 CH3CH = C(CH3)2
9 Various compound corresponding to molecular formula C1H10 are. Functional isomers Position isomers Chain isomers None of the abvoe
10 Alkyl cyanide and alkyl isocyanides are Tautomers Metamers Functional isomers None of the above
11 Compounds HCN and HNC are. Tautomers Metamers Functional isomers Conformers
12 In the Friedel-Craft acylation, the amount of AlCl3 tha tmust be taken is In catalytic amount One equivalent More then one equivalent Amount does not matter
13 Toluene is o/p -orienting with respect to an electrophilic substitution reaction due to. +1 effect of the methyl group. +1 as wellas +H effect of the methyl group Hyper conjugatin between the methyl group and phenyl ring. + R effect of the methyl group
14 1-Butyne on oxymereuration -demercuration would give. Butanone Butanal Propanol and methanol Propanoic acid and formic acid
15 The electrophile in the sulphonation of benzene is. SO3 SO3H HSO4 SO2
16 Nitrobenzen can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4 In the nitrating mixture. HNO3 acts as a. Base Acid Oxidizing agent Catalyst
17 Among the following statements in the nitration of aromatic compounds, the false one is. The rate of nitration of benzene is almost the same as that of hexadeutero benzene The rate of nitration of toluene is greater than that of benzene The rate of nitrationof benzen is greater than that of hexadeutero benzene. Nitration in an electrophite substitution reaction.
18 Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH gives. o - creaol p - creaol 2,4 -dihydroxy toluene Benzoic acid
19 The reaction of toluene with chlorine in the presence of light gives. Benzoyl chloride Benzyl chloride m-chlorotoluene Mixture of 0 and p -chlorotoluene
20 Each of the following compound is an aromatic except. Benzene Naphthalene Cyclopentadienyl cation Cyclopentadienyl anion
21 Who proved that all the six hydrogen atoms in benzen are equivalent. Kekule Ladenburg Faraday Wohler
22 When propyne is treated with equeous H2SO4 in the presence of HgSO4 the functional isomer of the major product obtained in. Propanal Acetone Propane 2 -nl Propanol
23 The addition HCl to 2-pentene give 3-Chloropentane 2- Chloropentyne 2- Chloropentane<br> 2-Chloro-2-methyl butane
24 The reduction of an alkyne to alkene using Lindlar's catalyst results into Syn addition of hydrogen atoms Anti addition of hydrogen atoms A mixture obtained by ayn and anti addition of hydrogen which are equilibrium with each other A mixture obtained by syn and anti addition of hydrogen which are not in equilibrium with each other.
25 Hydrocarbon X (C6H12) on oxidation with hot alkaline (KMnO4) gives a mixture of prop ionic acid and dimethyl ketone. The structure of compound X is CH3CH = CHCH2CH2CH3 (CH3)2 C = CH CH2 CH3 CH3CH2CH = CHCH2CH3 (CH3)2 C = C (CH3)2
26 Which of the following products is obtained when but 2-ene is treated with perchloric acid. CH3CHO only CH3COOH only CH3CHO and CH3COOH CH3CH2COOH + HCOOH
27 The addition of HCl in the presence of poroxule does not follow anti Markovnikov's rule because. HCl bond is too strong to be broken homolytically Cl atom is not reative enough to add on to a double bond Cl combines with H to give back HCl HCl is a reducing agent.
28 The addition of Br2 to cis 2-butene produces. (+) 2,3 - dibromobutane only (-) 2,3 -dibromobutane only (+) 2,3, dibromobutane meso-2,3, -dibromobutane
29 Which of the following is not obtained when Br2 is added to ethylene in the presence of aqueous NaCl solution. Br CH2CH2Br Br CH2CH2Cl ClCH2 CH2Cl ClCH2CH2Cl
30 The ease of hydrohalogenation of alkyl halide with alcoholic KOH is. 3<sup>o</sup> &gt; 2<sup>o</sup> &gt; 1<sup> o</sup> 3<sup>o</sup> &lt; 2<sub>o</sub> &lt;1<sup>o</sup> 3<sup>o</sup> &gt; 2<sup>o</sup> &lt; 1<sup>o</sup> 3<sup>o</sup> &lt; 2 <sup>o</sup> &gt; 1<sup>o</sup>
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