Alkyl Halides

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1Which of the following reagent cannot be used for preparing alkyl chloride from alcohol( )HCl+anhd.ZnCl2

( )NaCl

( )PCl5

( )SOCl2

Single Answer

2Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to( )The formation of less stable carbonium ion

( )Resonance stabilization

( )Larger carbon-hydrogen bond

( )The inductive effect

Single Answer

3Which of the foolowing with aqueous KOH will give acetaldehyde?( )1,2-Dichloroethane

( )1,1-Dichloroethane

( )Chloroacetic acid

( )Ethyl chloride

Single Answer

4DDT is formed from( )Benzene and chlorobenzene

( )Chloral and chlorobenzene

( )Chloral and benzene

( )Chlorobenzene and chlorine

Single Answer

5Ethyl chloride on treatment with aqueous alkali gives ( )Ethane

( )Ethene

( )Ethanal

( )Ethanol

Single Answer

6Reaction of ethylamine with chloroform in alcoholic KOH produces( )CH3OH

( )CH3NC

( )C2H5NC

( )C2H5CN

Single Answer

7What happens when CCl4 is treated with AgNO3 solution( )NO2 will be evolved

( )A white ppt. of AgCl will form

( )CCl4 will dissolve in AgNO3 solution

( )Nothing will happen

Single Answer

8Th most reactive compound for electrophilic nitration will be( )Benzyl choride

( )Benzoic acid

( )Nitrobenzene

( )Chlorobenzene

Single Answer

9For the carbylamine reaction we need hot alc.KOH and( )Any amin and chloroform

( )Chloroform and Ag powder

( )A primary amine and chloroform

( )A mono alkyl amine and trichloroethane

Single Answer

10The reaction between primary amine, chloroform and alcoholic caustic potash is called( )Wurtz reaction

( )Frankland reaction

( )Cannizzaro's reaction

( )Carbylamine raction

Single Answer

11Benzene hexachlride is used as( )Dye

( )Antimalerial drug

( )Antibiotic

( )Insecticide

Single Answer

12Cl2 reacts with CS2 in presence of AlCl3 to form( )CHCl3

( )CCl4

( )C2H5Cl

( )C2H6

Single Answer

13Which of the following does not give iodoform test( )Ethanol

( )Ethanal

( )Acetophenone

( )Benzophenone

Single Answer

14The reaction of 4-bromobenzyl chloride with NaCN in ethanol lead to( )4-Bromobenzyl cyanide

( )4-Cyanobenzyl chloride

( )4-Cyanobenzyle cyanide

( )4-Bromo 2-cyanobenzyl chloride

Single Answer

15C-X bond is strong in( )CH3Cl

( )CH3Br

( )CH3F

( )CH3I

Single Answer

16The final product formed by distilling ethyl alcohol with excess of Cl2 and Ca(OH)2 is( )CH3CHO

( )CCl3CHO

( )CHCl3

( )(CH3)2O

Single Answer

17C3H8 + Cl2------light---------->C3H7Cl + HCl is an example of( )Elimination

( )Substitution

( )Addition

( )None of these

Single Answer

18Which of the following compounds on oxidation gives benzoic acid( )Chlorophenol

( )Chlorotoluene

( )Chlorobenzene

( )Benzyl chloride

Single Answer

19Chloroform reacts with NaOH to give( )CH3COONa

( )Sodium oxalate

( )CH3OH

( )HCOONa

Single Answer

20When ethyl iodide and n-propyl iodide are allowed to react with sodium metal in ether, the number of alkanes that could be produced is( )Only one

( )Two alkanes

( )Three alkanes

( )Four alkanes

Single Answer

21Iodoethane reacts with sodium in ether, the product formed is( )Pentene

( )Propyne

( )Butene

( )Butane

Single Answer

22Which of the following reacts with chloroform and base to form phenyl isocyanide( )Nitrobenzene

( )Phenol

( )Chlorobenzene

( )Aniline

Single Answer

23Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2,4-Dinitrochlorobenzene is readily replaced because( )NO2 makes the electron rich ring at ortho and para positions

( )NO2 withdraws electrons at meta position

( )NO2 donates electrons at m-position

( )NO2 withdraws electrons at ortho and para positions

Single Answer

241,3-Dibromopropane reacts with metallic zinc to form( )Propene

( )Propane

( )Cyclopropane

( )Hexane

Single Answer

25C6H6Cl6 can be obtained from( )HCl and benzene

( )Cl2 and benzene and AlCl3

( )Cl2 and benzene in diffused light

( )NaOCl and benzene

Single Answer

26Ethyl alcohol gives ethyl chloride with the help of( )SOCl2

( )NaCl

( )Cl2

( )KCl

Single Answer

27Chlorobenzene on heating with aqueous NH3 under pressure in the presence of cuprous chloride gives( )Benzamide

( )Nitrobenzene

( )Aniline

( )Chloroaminobenzene

Single Answer

282-Bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is( )2-Ethoxypentane

( )Pent-1-ene

( )Cis-Pent-2-ene

( )Trans-Pent-2-ene

Single Answer

291-Chlorobutane on reaction with alcoholic potash gives( )But-1-ene

( )Butan-1-ol

( )But-2-ene

( )Butan-2-ol

Single Answer

30Butanenitrile is formed by reaction of KCN with( )Propyl alcohol

( )Butyl chloride

( )Butyl alcohol

( )Propyl chloride

Single Answer

31Ethyl bromide on treatment with alcoholic KOH gives( )Ethylene

( )Ethanol

( )Acetic acid

( )Ethane

Single Answer

32Benzene reacts with chlorine to form benzene hexachloride in presence of( )Nickel

( )AlCl3

( )Bright sunlight

( )Zinc

Single Answer

33Gammexane is( )Chlorobenzene

( )Benzyl chloride

( )Bromobenzene

( )Benzene hexachloride

Single Answer

34Tetrabromoethane on treatment with alcoholic zinc gives( )Ethylbromide

( )Ethane

( )Ethene

( )Ethyne

Single Answer

35Sn1 reaction of alkyl halides leads to( )Retention of configuration

( )Recemisation

( )Inversion of configuration

( )None of these

Single Answer

36How many monochlorobutanes will be possible on chlorination of n-butane( )1

( )2

( )3

( )5

Single Answer

37Which halide among the folowing is used as methylating agent( )CH3I

( )C2H5Cl

( )C2H5Br

( )C6H5Cl

Single Answer

38Cyanoform is_______acid in nature than the chloroform( )Stronger

( )Weaker

( )Amphoteric

( )Neutral

Single Answer

39To get DDT, chlorobenzene has to react with one of the following compounds in the presence of cnc.H2SO4( )Trichloroethane

( )Dichloroacetone

( )Dichloroacetaldehyde

( )Trichloroacetaldehyde

Single Answer

40Alkyl halides raect with Mg in dry ether to form( )Magnesium halide

( )Grignard's reagent

( )Alkene

( )Alkyne

Single Answer

41Which of the following will have the maximum dipole moment( )CH3F

( )CH3Cl

( )CH3Br

( )CH3I

Single Answer

42On warming with silver powder, chloroform is converted into( )Acetylene

( )Hexachloroethane

( )1,1,2,2-tetrachloroethane

( )Ethylene

Single Answer

43The reaction of an alkyl halide with RCOOAg produces( )Ester

( )Ether

( )Aldehyde

( )Ketone

Single Answer

44Unpleasant smell of carbylamine is ontained when chloroform and alcoholic KOH are heated with( )Any aromatic amine

( )Any primary amine

( )Any amine

( )Any aliphatic amine

Single Answer

45When primary amine racts with chloroform in ethanolic KOH, then the product is( )An isocyanide

( )An aldehyde

( )A cyanide

( )An alcohol

Single Answer

46Grignard reagent is nor prepared in aqeous medium but prepared in ether medium because( )The reagent is highly reactive in ether

( )The reagent does not react with water

( )The reagent becomes inactive in water

( )The reagent reacts with water

Single Answer

47Most reactive halide towards Sn1 reaction is( ) n-Butyl chloride

( ) sec-Butyl choride

( ) ter-Butyl chloride

( )Allyl chloride

Single Answer

48A set of compounds in which ractivity of halogen atom in the ascending order is( )Chlorobenzene, vinyl chloride, chloroethane

( )Chloroethane, chlorobenzene, vinyl chloride

( )Vinyl chloride, chlorobenzene, chloroethane

( )Vinyl chloride, chloroethane, chlorobenzene

Single Answer

49When chloroform is boiled with NaOH it gives( )Formic acid

( )Trihydroxymethane

( )Acetylene

( )Sodium formate

Single Answer

50Allyl chloride on dehydrochlorination gives( )Propadiene

( )Propylene

( )Allyl alcohol

( )Acetone

Single Answer

51Among the following the most reactive towards alcoholic KOH is( )CH2=CHBr

( )CH3COCH2CH2Br

( )CH3CH2Br

( )CH3CH2CH2Br

Single Answer

52Which compound give +ve iodoform test( )Butanol-1

( )Butan--al

( )Butanol-2

( )2-pentanone

Single Answer

53Which reperesents nucleophilis aromatic substitution reaction( )Reaction of benzene with Cl2 in sunlight

( )Benzyl bromide hydrolysis with water

( )Reaction of NaOH with dinitrofluorobenzene

( )Sulphonation of benzene

Single Answer

54Which of the following compounds gives trichloromethane on distilling with bleaching powder( )Methanal

( )Phenol

( )Ethanol

( )Methanol

Single Answer

55Tertiary alkyl halides are pratically inert to substitution by Sn2 mechanism because of( )Insolubility

( )Instability

( )Inductive effect

( )Steric hindrance

Single Answer

56Alkyl halides react with lithium dialkyl copper reagents to give( )Alkenes

( )Alkyl copper halides

( )Alkanes

( )Alkenyl halides

Single Answer

57Which of the following undergoes nucleophilic substitution exclusively by Sn1 mechanism( )Benzyl chloride

( )Ethyl chloride

( )Chlorobenzene

( )Isopropyl chloride

Single Answer