Page 2 :
88. Identify the compound Y in the following reaction., NH2, CugCl Y + N21, NaNO, + HCI, Cl, 273-278K, C1, (d), (c), CI, (b), CI, (a), CI, 89. Which of the following is halogen exchange reaction?, (a) RX + Nal- RI + NaX, (6) = + HX, H X, R-X + H,O, (c) R-OH + HX, CH, CH3, CH, Fe, (d), + Xp, dark, 90. Which reagent will you use for the following reaction?, CH, CH,CH, CH,Cl + CH, CH, CHCICH,, CH, CH, CH, CH,, (a) Cl,UV light, (c) Cl gas in dark, 91. The position of-Br in the compound CH,CH = CHC (Br)(CH,), can be classified as, (@) Allyl, 92. A primary alkyl halide would prefer to undergo, (a) Sy1 reaction, 93. The correct IUPAC name for diethyl bromomethane is, (a) 1-Bromo-1,1-diethoxyethane, (c) 1-Bromo-1-ethylpropane, 94. Reaction of C,H,CH, Br with aqueous sodium hydroxide follows, (a) S,1 mechanism, (6) S2 mechanism, (c) Any of the above two depending upon the temperature of reaction, (d) Saytzeff rule, 95. Which of the carbon atoms present in the molecule given below are asymmetric?, (b) NaCl + H,SO,, (d) Cla gas in the presence of iron in dark., (6) Aryl, (c) Vinyl, (d) Secondary, (6) S2 reaction, (c) a-Elimination, (d) Racemisation, (b) 3-Bromopentane, (d) 1-Bromopentane, OHH, HO,, a, bc d0, C-C-C-C, (a) a, b, c, d, H., н он, (b) b, c, (c) a, d, 96. Which of the following compounds will give racemic mixture on nucleophilic substitutou, OH ion?, (d) a, b, c, Br, (i) CH,-CH-Br (ii) CH,-C-CH,, C,H,, (iii) CH-, (a) ), C,H,, CH-CH,Br, (b) (). (), (i), 90 | Chemistry-XII: Term-1, (c) (), (i), (d) (i), (i)

Page 3 :
77. Which of the following reaction involves both aryl and alkyl halide?, 76. Which of the following are arranged in the decreasing order of dipole moment?, (a) CH,Cl, CH,Br, CH,F, ) CH,Br, CH,CI, CH,F, (b) CH,CI, CH,F, CH,Br, (d) CH,Br, CH,F, CH,CI, (a) Wurtz reaction, (c) Sandmeyer reaction, Which of the following compounds is not formed when a mixture of methyl bromide and ethyl, kromide is treated with sodium metal in the presence of dry ether?, (6) Wurtz fittig reaction, (d) Friedal-Crafts reaction, (a) butane, C.CI bond of chlorobenzene in comparison to C-CI bond in methyl chloride is, (b) ethane, (c) propane, (d) methane, (a) Longer and weaker, (c) Shorter and stronger, s0 Which of the following undergoes nucleophilic substitution exclusively by S1 mechanism?, (b) Shorter and weaker, (d) Longer and stronger, (b) Ethyl chloride, 81. A Grignard reagent may be made by reacting magnesium with, (b) Diethyl ether, 99 The conversion of an alkyl halide into an alcohol by aqueous NaOH is classified as, (a) Benzyl Chloride, (c) Chlorobenzene, (d) Isopropyl chloride, Ant, (a) Methyl amine, (c) Ethyl iodide, (d) Ethyl alcohol, [CBSE 2020 (56/5/1)], (a) A dehydrohalogenation reaction, (c) An addition reaction, 83. Fitting reaction can be used to prepare, (b) A substitution reaction, (d) A dehydration reaction, OLS, (a) Toluene, (b) Acetophenone, (c) Diphenyl, (d) Chlorobenzene, 84. Identify the end product (c) is the following sequence:, SOCI2, KCN, 20H/H*, C2 H;OH, (a), (b), (c), Pyridine, (alc.), (a) C,H;CH,NH,, (b) C,H,CONH,, (c) C,H,CO,H, (d) C,H;NH, + HCOOH, 85., alc. КОН, HBr, C, Na'ether, D, CH,CH,CH,CI, In the above reaction, the product D is, (a) Propane, (b) 2, 3-Dimethylbutane (c) Hexane, (d) Allyl bromide, 86., CH3-CH=CH-CH, + HBR→ A; 'A' is, ČH3, Br, (a) CH, C-CH CH, (b) CH-CH-CH-CH, CH, Br, (d) BRCH,-CH-CH-CH,, CH, (c) CH-CH-CH, CH,Br, CH3, 01. Which of the following alcohols will yield the corresponding alkyl chloride on reaction with, concentrated HCI at room temperature?, (6) CH,CH-CH-OH, CH,, (a) CH,CH,-CH,-OH, CH,, (d) CH,CH C-oH, CH3, () CH,CH CH-CH,OH, CH3, Haloalkanes and Haloarenes | 89

Page 4 :
[CBSE 2020 (56/3, (b) Sy1 reaction, (d) Sy2 reaction as well as Si reaction, 107. Alkyl halides on reaction with magnesium in presence of dry ether forms, (a) alkyne, 106. Racemisation occurs in, (@) Sy2 reaction, () Neither S, 2 nor SyI reactions, (0) alkene, 108. Ethyl alcohol gives ethyl chloride with the help of, (c) Cl,, (d) SOCI,, (b) NaCl, (a) KCI, Boil, Propane, (A), 109. Alkyl halide + Mg, The alkyl halide is, (a) isopropyl chloride (b) ethyl bromide, H;0, (d) n-butyl chloride, butyl chloride, KNO, X; Here X is, 110. C,H,CI, (d) None of these, (c) C,H-NO., (a) C, H,-O-N O CH-N=O, 111. The IUPAC name of vinyl chloride is, (a) 1-chloruetihane, ) 3-chloropropene (d) 1-chloropropene, (b) 1-chloroethene, 112. Anti-Markovnikov addition of HBr is not observed in, (a) pr pene, (c) but-2-ene, (d) pent-2-ene, (b) but-l-ene, 113. The reaction conditions leading to the best yield of C,H,Cl are, Dark, (b), CH, + Cl,, C,H, + Cl,, Room temperature, (Evess), uv light, (c) CH+ C,, (d) C, H, + Cl,, u An, (Exo, 114. Only two isomeric monochloroderivatives are possible for, (a) n-hexane, (c) benzene, (b) 2, 4-dimethylpentane, (d) 2-methylpropane, 115. n-propyl bromide on treatment with ethanolic KOH produces, (a) propane, () propene, (c) propyne, (d) propanol, 116. Sy2 mechanism proceed through the formation of, (a) carbonium ion, (b) transition state, (c) free radical, 117. The correct IUPAC name for H3C-CH-CH2-CH2-Cl is, (d) carbanion, C,H;, (a) 1-chloro-3-methylpentane, (c) 3-methyl-1-chloropentane, 118. Arrange the following compounds in order of increasing dipole moment :, Toluene (I); m-Dichlorobenzene (II); o-Dichlorobenzene (III); p-dichlorobenzene (IV)., (a) I< IV < II < III, (b) 1-chloro-3-ethylbutane, (d) 3-ethyl-1-chlorobutane, (b) IV < I< II < III, (d) IV < II < I< III, 119. C,H + MgBr, II > III >I> AI (), C,H, MgBr, D;0, The product 'B' is, (a) C,H,OH, 120. Which of the following reaction is most suitable for the preparation of n-propyl benzene, 'B', (b) C,H,OD, (c) CH, (a) Friedel craft's reaction, (d) CH,D, (c) Wurtz-Fittig reaction, (b) Wurtz reaction, (d) Grignard reaction, 92, Chemistry-XII: Term-1