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ae, , e, Vv alchemist, , TEST 1 HYDROCARBONS, Class 11 - Chemistry, Time Allowed: 1 hour Maximum Marks: 40, General Instructions:, EACH QUESTION IS OF 1 MARK,, 1, Which of the following reactions will yield 2, 2-dibromopropane? (1), a) CH = CH + 2HBr-> b) CH; — CH = CH; + HBr, c) CH; — C = CH + 2HBr > d) CH;CH = CHBr + HBr >, 2, ‘Inthe following sequence of reactions, the alkene is converted to compound B fi), , 0., CH,CH = CHCH, 24°" B, , The compound B--—.- is?, , a) CH,CH,CHO h) CH,CHO, c) CH; COCH, ad) CH;CH,COCH,, 3. Which of the following will not show geometrical isomerism? (1), a) Seal! » H \ H, ct a H.cf NcH,, ) i CH, a) Se <, cH.” cH, S °, 4, Benzene reacts with acetyl chloride in the presence of anhydrous AlCl; ta give --—--? f), a) acetophenone b) benzophenone, c) toluene d) ethyl benzene, 5, Presence of a nitro group in a benzene ring: fy, a) deactivates the ring towards b) activates the ring towards, electrophilic substitution, electrophilic substitution., c) renders the ring basic. d) deactivates the ring towards, nucleophilic substitution., 6. The most unlikely representation of resonance structures of p-nitrophenoxide ion is: (1), , a) b), , alchemist 1/6

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10., , 11., , 12., , 13,, , ° “O,0, , AS, Oo, oO \y 2? a AO, 0, The correct IUPAC name of the following alkane is:, H.C—CH,—CH—CH,—CH,—CH—-CH,—CH,, CH 'H,, cv, CH, be, a) 3 - Isopropyl - 6 - ethyloctane b) 5 - Isoprapyl - 3 - ethyloctane, c) 3,6 - Diethyl - 2 - methyloctane d) 3 - Ethyl - 5 - isopropyloctane, Which of the following reactions of methane is incomplete combustion,, Mo,0., 8) CH, + Oy + HCHO + H,0 b) CHg + Oz —+ COz (g) + 2H20, ©) CHy + 02 > Cls) + 2H,0 @) ad Coat /100/aten, , 2CH, + 02 ——————> 2CH30H, A gas decolourised by KMnQg solution but gives no precipitate with ammoniacal cuprous, chloride is, , , , a) Methane bh) Ethene, c) Ethane d) Acetylene, The increasing order of reduction of alkyl halides with zine and dilute HCl is, a) R-Cl < R-Br < R-I b) R-1< R-Br < R-Cl, c) R-Br < R-I1< R-Cl d) R-Cl < R-I < R-Br, An aqeous solution of compound A gives ethane on electrolysis. The compound A is ........ 2, a) Sodium propionate hb) Sodium acetate, ¢) Sodium ethoxide d) Ethyl acetate, The following reaction is:, (CH3)3C-Br a (CHy)3C-OH, a) Displacement reaction b) Elimination reaction, c) Substitution reaction d) Free radical reaction, , Which conformation of ethane has the lowest potential energy?, , a) Eclipsed b) Skewed, , alchemist, , (1), , (1), , 18), , (1), , (1), , fl], , 1), , 2/6

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14., , 15,, , 16., , 17., , 18., , 19,, , 20., , 21., , c) Staggered d) All will have equal PE, , Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one, isomer of monosubstituted alkyl halide?, , a) Tertiary butyl chloride h) Neohexane, , c) Neopentane d) Isohexane, , Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms, the presence of:, , a) a vinyl group b) two ethylenic double bonds, , ¢) an isopropyl group d) an acetylenic triple bond, The non-aromatic compound among the following is, , aZy, , Ss, , cZ \, ping, , OD, a)B be, Ca dD, , Among the following compounds, the one that is most reactive towards electrophilic nitration, is, , , , a) Nitrobenzene b) Benzene, , c) Toluene d) Benzoic Acid, The synthesis of 3-actyne is achieved by subsequent stepwise reactions of sodium amide with, an alkyne, and a bromoalkane. The bromoalkane and the other alkyne respectively are:, , a) BrCH2CH2CHg and b) BrCH2CH)CH2CH2CH3 and, CH,CH,CH,C = CH CH;C = CH, ¢) BrCH2CH2CH2CH3 and d) BrCH2CH2CH2CH2CH3 and, CH;CH,C = CH CH;CH,C = CH, Which of the following is correct regarding the stability of carbocation?, a) 3°>2°>1° bh) 2°> 3° > 1°, ¢) 2°> 1°> 3° d) 3°<2°<1°, , A liquid hydrocarbon is converted to a mixture of gaseous hydrocarbon by 7, , a) hydrolysis bh) oxidation, c) cracking d) distillation, The catalyst required for the given reaction is, , Catalyst, HC =CH+dil. H,SO, —> CH3CHO, , alchemist, , [1], , 1), , (1), , (1), , 1, , (1), , (1), , (1, , 3/6

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22., , 23., , 24,, , 25., , 26,, , 27., , 28., , 29,, , a) Pd b) HgSOg, ¢) AICls d) Pt, , Arrange the following alkyl halides in decreasing order of the rate of 3 - elimination reaction, with alcoholic KOH, 1, |, A. CH; - C - CH,Br, thy, , B. CHy-CH-Br, C. CHg-CH9-CH9-Br, , a)C>B>A b)A>B>Cc, co) B>CrA aA>C>B, Arrange the following hydrogen halides in order of their decreasing reactivity with propene., a) HCl > HBr > HI b) HI > HBr > HCl, c) HCl > HI > HBr d) HBr > HI > HCl, , Arrange the following carbanions in order of their decreasing stability., , A. H3C-C=C, , B.H-C=C, C.H3C- CHa, a) B>A>C b)A>B>Cc, o)C>A>B aC>B>A, Acetylene is prepared by the action of water on:, a) all of these b) CaCz, ¢) Silicon carbide d) AlgC, , The peroxide effect in anti-Markovnikov's addition of HBr to unsymmetrical alkenes invalves, a) homolytic fission of the double bond b) a free radical mechanism., , c) heterolytic fission of the double bond —d) an ionic mechanism, The treatment of CHaMgX with CH3C = C - H gives, , a) CHa - CH = CHp h) CH3C = C-CH3, , ©) H3C-CHg d) CHy, , A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon., , The derivative is i, , a) 1, 4-dibromobutane b) 1, 1-dibromopropane, , c) 2, 2-dibromobutane d) dibromoethane, Renzene reacts with chlorine in the presence of sunlight and in the absence of halogen, , alchemist, , 0), , et, , (1), , i), , 1), , 1], , (1), , o, , 4/6

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31,, , 32,, , 33., , 35., , carriers to give ............. ?, , a) CoC b) CyHyCly, CCl a) CgHsCl, Ozonolysis of an organic compound 'A’ produces an equimolar mixture of acetone and 1), propionaldehyde., Identify the organic compound ‘A’,, a) 1-Pentene b) 2 - Methyl - 1 - pentene, ¢) 2 - Methyl - 2 - pentene d) 2 - Pentene, , Assertion (A): Propene reacts with HBr in the presence of peroxides to give 1-bromopropane. [1], Reason (R): Alkenes react with HBr in the presence of peroxides according to antiMarkovnikov's rule., , a) Both A and R are true and R is the b) Both A and R are true but R is not the, correct explanation of A. correct explanation of A., c) Ais true but R is false. d) Ais false but R is true., Assertion (A): Nitration of benzene with nitric acid requires the use of concentrated fi), sulphuric acid., , Reason (R): The mixture of concentrated sulphuric acid and concentrated nitric acid produces, the electrophile, NO, ., , a) Both A and R are true and Ris the b) Both A and R are true but R is not the, correct explanation of A. correct explanation of A., c) Ais true but R is false. d) Ais false but R is true., Assertion: Rates of nitration of benzene and Hexadeuterobenzene are different. (1), , Reason: Nitration depends upon the availability of nucleophile., , a) If both Assertion & Reason are true b) If both Assertion & Reason are true, and the reason is the correct but the reason is not the correct, explanation of the assertion. explanation of the assertion., c) If Assertion is true statement but d) If both Assertion and Reason are, Reason is false. false statements., Assertion (A): Alkylbenzene is not prepared by Friedel Crafts alkylation of benzene. (1), Reason (R): Alky! halides are less reactive than acyl halides,, a) Both A and R are true and Ris the b) Both A and R are true but R is not the, correct explanation of A, correct explanation of A., ¢) Ais true but R is false. d) Ais false but R is true., , (1), , /, , \ J, Assertion (A): Hydrogenation of =< is slowerthan \—— ., Reason (R): More substituted alkenes are more stable by hyperconjugation., , a) Both A and R are true and Ris the b) Both A and R are true but R is not the, correct explanation of A, correct explanation of A., , alchemist 3/6